Memorable moments from MTV Movie Awards' first 25 years

LOS ANGELES - Turning 25 years old is a major milestone in anyone's life. It's the point at which one is expected to put away childish things in favor of more grown-up and mature activity. Unless, of course, the one coming of age is the MTV Movie Awards. To celebrate the momentous occasion, the award show, hosted by Kevin Hart and Dwayne Johnson, will be taped live on the Warner Bros. backlot to air Sunday. And if the history of the show is any indication, there will be plenty of childish antics...