Forrest Gump
Forrest Gump is about a “local idiot” getting into increasingly convoluted situations that place him at the center of globally important events. In one of those scenarios, he gets a football scholarship to the University of Alabama.
Then, during a game, Forrest scores a touchdown and just keeps on running right out of the stadium. His coach quips that he might be the stupidest so-and-so alive, but he sure is fast.
During the entire scene, his assistant coach never stops smiling with that disturbing, open-mouthed grin. Finally, mercifully, he bellows, “YEAAH!” and we were just thankful for anything to make him change facial expressions.