In the cinema I laughed so much at Borat, South Park (really really funny that one, although as with Borat it probably helps if you're not a stupid prude), Austin Powers: Goldmember, Ace Ventura: When Nature Calls (it's not a fantastic movie but at the time I was such a fan of Jim Carrey and that whole film is just him messing around, it's great if you just want laughs).