This cult classic gross-out stoner film wasn't a box office smash, but it's broadly appreciated by its intended audience, who loved it. The premise sees a weed smoking video game tester forced to move back in with his Grandma. It's also notable for an appearance by Jonah Hill in the days just before he became truly famous.
In one of the scenes, our protagonist is suffering an extreme case of the munchies and shoves a whole tray of mostly unsuitable food into the oven. One of the items on the tray is a banana. When the tray comes back out, the banana has vanished! Did it evaporate? Do grandmas have magical ovens, which is why their cooking always tastes so good? Or did the people making this film get a little too far into character and miss this obvious error because they were high?