Star Wars is hilarious when you spot the plot holes.
The bit when C3P0 & R2D2 are hiding in the cupboard on the deathstar (because a deathstar needs cupboards) and the stormtroopers find him, C3P0 just tells them the people they are looking for went "that-a-way" and the stormtroopers just did what he said. Shouldn't they have gone "Fuck, who the hell are you" therefore ending the story right there and then as the main characters get crushed in the trash-squasher.
Trading Places
My Cousin Vinny
Tom and Jerry (only those directed by Fred Quimby)
Coming to America
Most of Charlie Chaplins stuff