Me, Myself and Irene (2000)
Dir: Bobby Farrelly, Peter Farrelly
Stars: Jim Carrey, Renee Zellweger, Anthony Anderson, Mongo Brownlee
Charlie, a Rhode Island state trooper, who, after years of continuously suppressing his rage and feelings, suffers a psychotic breakdown which results in a second personality, Hank.
Watch here: https://www.youtube.com/watch?v=orAfWcsMjJE