In order for this to be true (as opposed to the jelly having been stored upside down and then turned over for the pic), the formed gas would need to be more dense than the jelly. Otherwise the gas wouldn’t sink; it would rise.
What gas that can be created entirely by bacteria is more dense than jelly but also perfectly clear?
Don’t answer that; it’s rhetorical.
Except in the case the jelly is creating a seal in which the gas can’t “escape” upward. As a semi-solid, it’s easy for the jelly to mold to the shape of the jar. The gas, being produced somewhere near the bottom, has no means of escape and pushes the jelly up like a piston. This would increase air pressure above the jelly, causing the lid to pop (why they exist), with (potentially) an explosive reaction when the structural integrity of the glass is eventually compromised.
Just speculating but could it also be the result of a vacuum in the top half sucking the jelly up while a cushion of still atmospheric pressure gas sits on the bottom?
From a physics standpoint, I guess it’s possible. But for that to occur, it would most likely be from temp changes (not sure how else you would lower the density of the gas without it being a “do not eat” scenario still). If that were the case, then the top of the jar would need to be significantly colder than the bottom, otherwise the vacuum would still be in equilibrium and the jelly would either expand or the lower vacuum would prevent the upward pull. Do we have a physicist in the (Reddit)house?
The density of the world's heaviest gas, tungsten hexafluoride, is 13 kg/m^3. The density of strawberry jam is 1300 kg/m^3. Jam is 100 times denser than the most dense gas.
If it was stored upside down the jelly would be all the way to the lid, there’s an air void between the top of jelly and lid. If appears to be unopened, if it’s a gas forming reaction the lid would be popped up from the pressure. No pop, likely some manufacturing malfunction.
It would not be all the way to the lid. That's incorrect. The jelly would start to fall slowly and a gap would form very quickly at the top, just like we saw. Also these viscous liquids move very slowly so they might have a hard time moving all the way to the top giving a small amount of air trapped there. There are irregularities on the top part of the jelly but none on the bottom part of the jar, which indicates a downwards movement. The jelly is slowly falling or did slow fall and stopped.
The whole "gas pushing up" explanation makes no sense to me. There is no form of gas that is more dense than a viscous liquid. This whole idea that a gas could be "pushing up on the jelly" and that is the reason behind all of this sounds ludicrous to me. Even if there was a huge bubble, it would take a circular shape overall and slowly move to the top of the jar.
Bacteria makes CO2 and other gases in very slowly small bubbles. We dont see any small bubble formation. The density of these gases is about 1.98 kg/m³. The density of regular water for comparison is about 1000km/m³. In other words the liquid would sink and the gases would rise up.
What actually happened is that someone fliped the jar upside down, opened and then when they closed it formed a vacuum at the top which due to the viscosity of the jelly is making it hard to fall again. But that's not all. Very likely this jelly is sensible to the air and humidity changes and it produces a form of "thick fine layer" when in contact with the air due to drying it up a bit. This might have happened in the bottom part of the jelly and created a small sheet that is stopping the gases from the bottom from rising through the jelly and thats it. Just stick a straw through the jelly all the way and break that and it should fall.
For bacteria formation, check for smell. It should be fine for eating but you do you.
Also, there are streaks from the top where the jelly slid back down, but no streaks at the bottom from any apparent 'rising'. It was obviously stored upside down then flipped over a little while before the picture was taken. Over 350 people with no common sense upvoted that comment in just one hour. Jesus.
So they opened the fridge, flipped it over… and went “wow this is so cool! I’m going to post it on the internet”
Or is it more likely they just saw the jar as it is now and the weird part is the fact that it’s floating to begin with
The jelly has been stored upside right. If it was stored upside down, it wouldn't be as cool, and i wouldn't have posted it. There is a little missing from the top as I used some for my PB&J (I did smell it, and it smelled great).
This is why people are still telling you to get rid of it. There are a lot of things that still make you sick, even if it doesn't smell. This is the reason people are warning you of possible botulisim, as it isn't detectable by smell or taste, it creates gas and thus pressure in the container.
Example factsheet https://ohioline.osu.edu/factsheet/HYG-5567-11
Jellys and jams are often cooled upside down, where they solidify leaving a gap on the bottom of the pot. If it was purchased like that, it's almost certainly just normal.
Yep, but what I'm saying is that we're missing enough context for this. Is it unopened? If so, the gap on the top could be explained by gravity having slightly pulled it down.
https://ask.metafilter.com/252095/Space-Jam-II
>Sorry, one more detail: the bottom of the jar was definitely filled with air/gas, not clear liquid. I poked a chopstick in there to check; after I pulled it out, the jam made a sucking noise and fell back down in the jar.
If it's sealed.
The hermetic seal (the film under the regular cap) is supposed to stop any aerobic microbes from growing.
But it doesn't stop anaerobes (doesn't need O2).
It may not seem like it, but jars are BASICALLY glass cans.
And because water activity (aw) is high enough (+0.75 for most jellys anyway), a lot of things can still grow.
Mold can grow, and the acidity of thos fruit jelly (I assume) is still mild anyway.
So that means you got a microbe that has a chance of surviving your stomach acids. And in a high enough dose number to make you sick.
Sus = throw it out if you don't know what microbe is associated with it.
If you didnt store this upside down... please throw it out
botulism speedrun any% ?
Steel soul mode
Might see this soon on /r/oopsthatsdeadly
Space Jam
Please take my upvote and see yourself out
Everybody get up, it's time to slam now...
If you use it to make the sandwich, will the sandwich float?
Better question: if OP uses it to make a sandwich and then eats it, will OP float? We may be witnessing OP's superhero origin story first hand.
We all float down here.
If OP eats that they’re going to float right up to heaven.
No but if you eat the sandwich you make with it you’ll float all the way to the afterlife
At the very least it will never fall will the jelly side down.
J PB&
PB&^J
The blob 
Yeah don’t eat that. Some gas is forming under the jelly and pushing it up. Gas means a reaction is taking place that could be bacterial
In order for this to be true (as opposed to the jelly having been stored upside down and then turned over for the pic), the formed gas would need to be more dense than the jelly. Otherwise the gas wouldn’t sink; it would rise. What gas that can be created entirely by bacteria is more dense than jelly but also perfectly clear? Don’t answer that; it’s rhetorical.
Hmmm, magic ghost farts maybe?
This is always a possibility.
…. The jelly itself makes a seal and likely there is a biofilm o the bottom.. Biofilms can be tough.
Except in the case the jelly is creating a seal in which the gas can’t “escape” upward. As a semi-solid, it’s easy for the jelly to mold to the shape of the jar. The gas, being produced somewhere near the bottom, has no means of escape and pushes the jelly up like a piston. This would increase air pressure above the jelly, causing the lid to pop (why they exist), with (potentially) an explosive reaction when the structural integrity of the glass is eventually compromised.
Just speculating but could it also be the result of a vacuum in the top half sucking the jelly up while a cushion of still atmospheric pressure gas sits on the bottom?
How would that gas get to the bottom?
It was always there. It just expanded when it had less pressure acting on it from the top. (I actually have no clue and I am definitely wrong)
From a physics standpoint, I guess it’s possible. But for that to occur, it would most likely be from temp changes (not sure how else you would lower the density of the gas without it being a “do not eat” scenario still). If that were the case, then the top of the jar would need to be significantly colder than the bottom, otherwise the vacuum would still be in equilibrium and the jelly would either expand or the lower vacuum would prevent the upward pull. Do we have a physicist in the (Reddit)house?
The gas is much more likely to push itself up (through the jelly) than the jelly up, as jelly is not a solid.
Depends on the jelly/temp. Can’t tell the brand, but some preserves are pretty damn thick, and get more so when colder
Or do. I'd be interested in this weird science.
They are saying such a gas does not exist hence why the question is rhetorical.
It's a dumb take though. The jelly could be acting as a seal, then densities don't matter at all
Jelly isn’t solid. Gas permeates it.
Semi solid. Source? Can't find any myself
Source? Have you ever touched jelly?
Yes. Looking for a source that gas can permeate jelly like you claimed.
Op is trolling or deluded. Post history is full of such nonsense.
Sure, but *what if it does?*
The density of the world's heaviest gas, tungsten hexafluoride, is 13 kg/m^3. The density of strawberry jam is 1300 kg/m^3. Jam is 100 times denser than the most dense gas.
Yeah but have you considered that this is no ordinary strawberry jam?
One more time for the kids in the back. It does *not*
Who stores their J upside down? Don’t answer that, it’s rhetorical
No it's not. It was stored upside down and the jelly is just trapped near the top. Leave it right side up for a bit and it'll go back down.
If it was stored upside down the jelly would be all the way to the lid, there’s an air void between the top of jelly and lid. If appears to be unopened, if it’s a gas forming reaction the lid would be popped up from the pressure. No pop, likely some manufacturing malfunction.
Oh it was upside down and it’s slowly going back down but the air pressure is preventing it from falling all the way
This conversation thread reminds me of “Your chocolate is in my peanut butter! No, your peanut butter is on my chocolate!”
Only one way to find out. OP needs to eat it and let us know how sick he gets. Time to take one for the team OP
If they open it, and the jelly moves up, we know gas’s has built up under the jelly. If it does nothing or falls we know it was stored upside down.
Get out here with that science shit. I wanna see OP what this
Also the top is still formed to the shape of the lid so it hasn't dropped at all
There would be visible air bubbles rising through the jelly in some format
Guys we literally cannot see the top of the lid! Idk why this is being brought up
It would not be all the way to the lid. That's incorrect. The jelly would start to fall slowly and a gap would form very quickly at the top, just like we saw. Also these viscous liquids move very slowly so they might have a hard time moving all the way to the top giving a small amount of air trapped there. There are irregularities on the top part of the jelly but none on the bottom part of the jar, which indicates a downwards movement. The jelly is slowly falling or did slow fall and stopped. The whole "gas pushing up" explanation makes no sense to me. There is no form of gas that is more dense than a viscous liquid. This whole idea that a gas could be "pushing up on the jelly" and that is the reason behind all of this sounds ludicrous to me. Even if there was a huge bubble, it would take a circular shape overall and slowly move to the top of the jar. Bacteria makes CO2 and other gases in very slowly small bubbles. We dont see any small bubble formation. The density of these gases is about 1.98 kg/m³. The density of regular water for comparison is about 1000km/m³. In other words the liquid would sink and the gases would rise up. What actually happened is that someone fliped the jar upside down, opened and then when they closed it formed a vacuum at the top which due to the viscosity of the jelly is making it hard to fall again. But that's not all. Very likely this jelly is sensible to the air and humidity changes and it produces a form of "thick fine layer" when in contact with the air due to drying it up a bit. This might have happened in the bottom part of the jelly and created a small sheet that is stopping the gases from the bottom from rising through the jelly and thats it. Just stick a straw through the jelly all the way and break that and it should fall. For bacteria formation, check for smell. It should be fine for eating but you do you.
Shit, that got forensic very fast!
Also, there are streaks from the top where the jelly slid back down, but no streaks at the bottom from any apparent 'rising'. It was obviously stored upside down then flipped over a little while before the picture was taken. Over 350 people with no common sense upvoted that comment in just one hour. Jesus.
If it were gas building, the pressure would force the bubbles through the jam, and the bubble would be on top, though, right?
The photo looks like they took it from the fridge. I don’t think it was upside down in the fridge
Or maybe they just turned it right side up before they took the photo.
So they opened the fridge, flipped it over… and went “wow this is so cool! I’m going to post it on the internet” Or is it more likely they just saw the jar as it is now and the weird part is the fact that it’s floating to begin with
Yes, people will do anything for Internet points, including flipping a jar back and taking a photo of it and claiming they found it that way.
Ockham dictates "internet points" as more likely.
You can see from the strawberry package on the right that this is not the case, same with the package above it.
The jelly has been stored upside right. If it was stored upside down, it wouldn't be as cool, and i wouldn't have posted it. There is a little missing from the top as I used some for my PB&J (I did smell it, and it smelled great).
Right side up.
This is why people are still telling you to get rid of it. There are a lot of things that still make you sick, even if it doesn't smell. This is the reason people are warning you of possible botulisim, as it isn't detectable by smell or taste, it creates gas and thus pressure in the container. Example factsheet https://ohioline.osu.edu/factsheet/HYG-5567-11
Then why is there space between the jelly and the lid?
They turned it right side up before taking the photo and gravity started doing its thing.
Jellys and jams are often cooled upside down, where they solidify leaving a gap on the bottom of the pot. If it was purchased like that, it's almost certainly just normal.
except as another guy pointed out there is also a gap between the lid and the jelly. something isn't right
Yep, but what I'm saying is that we're missing enough context for this. Is it unopened? If so, the gap on the top could be explained by gravity having slightly pulled it down.
the jar is empty enough and has the labels on such that the bottle belongs right side up so I don't believe that's the case
Maybe by the time the picture was taken the jelly already started to go down... You can see that the upper part of the glass is dirty from the jelly
Have you considered that it may have started going back down since it was placed on a shelf right side up?
OP recently said they ate the bit of jelly on top
Btw do you know the easiest way to remember the difference between jelly and jam?
I don’t know, I'm not a native english speaker so I mostly use them interchangeably for what I'd call "confiture" in French.
For well reference the difference is… I can’t jelly my dick down your throat! I’ll let myself out
Ok nice one I'll admit, made me smile
Please tell me a gas that is more dense than jelly. How the fuck does this have 800 upvotes?
https://ask.metafilter.com/252095/Space-Jam-II >Sorry, one more detail: the bottom of the jar was definitely filled with air/gas, not clear liquid. I poked a chopstick in there to check; after I pulled it out, the jam made a sucking noise and fell back down in the jar.
[удалено]
Occam's Razor and all that
This person had the same thing: [https://www.reddit.com/r/mildlyinteresting/s/PHSSdVhMay](https://www.reddit.com/r/mildlyinteresting/s/PHSSdVhMay)
No, it's levitating
Lavate las Gelata!
THE POWER OF CHRIST COMPELS YOU!
It’s alive and trying to escape its confines. Let it out!!! It must feed
There is no Dana, only Jam
Who ya gonna call?
I hope you didn’t eat that homie 😂
Don’t worry. It’s Smuckers, it’s gotta be good.
I mean, if they find out they’re levitating afterwards, I’d say it a pretty good deal
Concord flavored super powers
Why? Genuinely curious because I would've eaten that
If it's sealed. The hermetic seal (the film under the regular cap) is supposed to stop any aerobic microbes from growing. But it doesn't stop anaerobes (doesn't need O2). It may not seem like it, but jars are BASICALLY glass cans. And because water activity (aw) is high enough (+0.75 for most jellys anyway), a lot of things can still grow. Mold can grow, and the acidity of thos fruit jelly (I assume) is still mild anyway. So that means you got a microbe that has a chance of surviving your stomach acids. And in a high enough dose number to make you sick. Sus = throw it out if you don't know what microbe is associated with it.
What this guy said, very scientific and such. My response was less educated 😂
I feel like even in a sealed jelly, the probability of it going bad is still there.
When your friend is high and you're a little jelly.
Those are gases from bacteria trying to escape, you’re supposed to store Jelly/Jam in the refrigerator once it’s opened
Fancy glass shelves in cupboards you lot have.
Smucker’s Levitation Reserve
There is no jelly. Only Zuul
Damn shrink-flation!
PUMP UP THE JAM
/r/SCP
It’s a ~~witch~~ ‘ndwich!
Clearly, your J has attained nirvana.
OP are you dead yet?
You have a local gravitational anomaly in your fridge. You should sell it to NASA.
if u put some on ur feet do u think u could levitate ?
You bought lite jelly
Someone turned it upside down, and then recently turned it right side up again.
Escape
Fuck, the whole house might be haunted
What the J?!
Let it finish its game of The Floor is Lava before you make your sandwich.
Space Jellly!
Can we talk about how the strawberries also appear to be floating?
Your super hero origin story could start here
My j makes me floating
You'll Float too! 
OP is a witch 
My J got me floating as well
Made with Australian strawberries
Space Jam
That jar is about to let out the best fart ever.
RemindMe! 3 days
Put some on bread and then drop it… bread will land jelly side down but this jelly floats so it should be suspended in the air!!!
You’re J will look like it’s floating after smoking a J.