Almost all happened freshman year of college:
Roommate buys burger, stashes it in fridge only to rediscover some time later. While he eats it, other roommate comments on the lettuce looking weird. Roommate only then realizes that the burger didn't come with lettuce, what he saw was mold.
Roommate is out of all sorts of receptacles in which to make Easy Mac, only thing left are plastic Dixie cups, so he throws the stuff in it and pops it in the microwave. When he takes it out, the cup had shrank down to a bowl shape and the mac reeked of plastic.
Guy down the hall doesn't understand the concept of boiling water, so he puts water in the kettle, puts the kettle in the microwave, and proceeds to set the kitchen area ablaze.
Roommate is boiling eggs, forgets about them, comes back to find that the water all boiled off and he burnt his eggs. Ate them anyway.
Friend is in that awkward period between the last days of class and going home, where you try to live off of what you have in the fridge because buying groceries is annoying and wasteful. During the last couple days he eats a pickle wrapped in a Kraft single.
My lowest point was probably eating a huge bag of gummy worms for breakfast, lunch and dinner during finals.