Monsters Inc. Hey Ted, Good Morning (ORIGINAL)
When Sulley greets Ted (the monster so big we only see the lower half of his body), Ted was originally supposed to roar like Godzilla. The filmmakers asked permission from Toho (Godzilla's film studio) to use a Godzilla roar, but Toho turned them down, so Ted responds with a chicken cluck instead.
IMDb Trivia