There's nothing comedic about being locked in a chest, sorry to anyone who's been through this hell.

My twin brother did this once, during a game of hide and seek (it was a rainy day, so we played inside). He hid in this antique wooden footlocker that my stepmother inherited, and somehow locked himself in it. Eventually, claustrophobia set in while we were trying to find the key (without my dad or stepmother finding out) and he kicked out the whole side of this thing, the whole piece, nails and all. He caught hell for it later, but damn, the fact that a ten year old can do that is pretty damn impressive.