Oh man just one? cant pick just one!!! The big lebowski dumb and dumber bruno napolean dynamite night at the roxbury I could go on and on but those are ones off the top of my head
American Wedding-Eating that dog turd was one of the funniest scenes I ever saw. The Grove tube-Chevy Chase's first movie Caddy Shack-Chevy Chase and Bill Murray doing cannon balls Animal House-The horse in the office scene, Belushi smashing the guitar International House-1933 with George Burns&Gracie Allen, W.C.Fields, Cab Calloway sings THE REFER MAN, Rudy Vallee, Bela Lugosi, Peggy Hopkins Joyce, Baby Rose Marie
It's impossible to choose just one so ill give a few: Bruno Dumb and dumber The big lebowski Napolean dynamite Beer fest
All the Ernest movies and the Thumb movies--y'know thumbtanic, thumbwars, batthumb, frankenthumb, the blair thumb. The best.
I think Spaceballs, maybe Blazing Saddles or Airplane. Modern comedies don't really do it for me. I mean, what the hell was Napoleon Dynamite about? Total garbage.