Apocalypse Now

When Marlon Brando arrived on set, Francis Ford Coppola was horrified to find that Brando had never read "Heart of Darkness," did not know his lines, and had become extremely fat (Kurtz had always been written as a tall but starvingly-thin man). After some panicking, Coppola decided to film the 5'10" Brando as if he was a massively built, 6'5" brute (to explain Brando's size) and steered the camera clear of Brando's huge belly.