I saw The Ringer a few years ago at the cinema, a film where Jonny Knoxville pretends to be mentally challenged in order to enter the Special Olympics and win money.
It was on TV the other week and I watched it again. There was some really funny parts in the movie but the clip below was by far the funniest. I nearly pished myself when the guy in the back came out with the comment about ice cream. The funny thing is, the guy who said it (winston) hardly had any lines in the whole movie and then he came out with this nugget!