April's Alligator From 'Jackass: The Movie' (2002)
Crikey! This clip from the original film finds Bam Margera's mother, April, walking in on an alligator in her house. Unlike the gorilla prank in Jackass 3D, this gator is very much real, which April realizes only after it starts growling and moving around. Pause the clip at the 1:02 mark to see one of the most terrifying expressions ever caught on tape.