Well, my "Chicken McSchool" sandwiches that were the school lunch in 4th and 5th grade had...well...unknown and unidentifiable parts in them. I think I ran into a part of an eyeball once, and they were always full of veins.
One time, a giant bag of rice grew a bunch of click beetles in it. I said, eat them anyway! My mom threw it away. Oh well.
[highlight]My friend's burger had a footprint in it once...[/highlight]
Then there were the two spiders I ate last year as dares, but I guess that was intentional.
In 5th grade, we used to take the school hot dogs and bounce them. You could get them almost to the ceiling if you wanted. Then you would take them home and grow crystals with them. Nobody actually ate them!
Plenty of hairs, all over the place. I'm used to them. I just pull them out of my teeth and keep eating. Dog hairs suck, though, because they stick more than normal hairs to the roof of your mouth.
Moldy cheese is nasty. I've confused cheddar for colby jack before (luckily I caught myself and didn't eat it!)
I've had my bird poop on my lip before. I thought that was food...(blecch!)
Confusing fruit punch for Sangria...(blecch!)
Pickles...(blecch!)
Etc.
-Mark