The last film that made me all snotty from laughing like a crazy person was Little Miss Sunshine. Made even funnier by the fact i was watching it in my village hall, and was the youngest person there by 40 years, and no one else was finding it very funny.
Before that Bottle Rocket made me cry laughing alot - i loved it, but have never met anyone else whose seen it.
What films make you laugh so much it hurts?