Airplane!

Captain Oveur: *You ever been in a cockpit before? *Joey: *No sir, l've never been up in a plane before. *Captain Oveur: You ever seen a grown man naked? Some small snippets of this have aged poorly, but aside from that, I think Airplane is genuinely the funniest film I have ever seen. The laughs per minute number in this is absolutely crazy! Not every joke is a hit but the pacing is breakneck. There's so much great dialogue and situational comedy thrown at you from the second the movie starts. You don't really get time to breathe from all the laughter.