My girlfriend picked out a jar of pickles (I hate pickles) at WalMart. I know, I know, but I'm in college and it's the only gig going. Anyway, there was a dead fly that you could see through the jar. We gave the jar to the 3 toothed WalMart employee that couldn't have cared less. I shop downtown here in Morgantown at the natural food store now.
The rest of the fridge is/was just fine... (ok, so some carrots down in the veg tray sometimes gets a little wrinkly, but) that bowl was some left over dessert that I put a dinner plate as a lid on, and then left for the next day...
Now, as you understand, it didn't just stand 'till the next day, but on the other hand it didn't stand there more than a week and a half or so, so when I took it out (to throw it away) and removed the lid I was shocked and amused enough to fetch the camera... I didn't expect that much "growth"...
I doubt it. The pranks in this household usually extend to unexpected airhorns. All the decent pranks are played against our friend's house (washing up liquid in washing machine)