He's being dropped into a wooden box the size of a phone box full of popcorn and has eight hours to eat it.

Crazy Legs Conti is a competitive eater, which means he enters competitions to eat loads of a certain type of food in a fixed length of time.

Now someone has made a film about him, and to get people to see his film, Crazy Legs will eat the popcorn.

He'll be munching the popcorn in a cinema in New York where his film is being shown as part of a film festival.

He's also the world oyster eating champ and says he really wants to win a famous Hot Dog contest in July in New York, thought of as the biggest competitive eating contest in the world.