Superbad is absolutely hilarious. I recently showed it to my children. Deeply juvenile, but so much fun.

War Horse has a lovely score by John Williams. Really beautiful. Much of that was shot a stone's throw from where I live, by the way (I could pretty much see Steven Spielberg from my house, though I chose not to go and say hello as I generally don't believe in meeting one's heroes). As for the film, I preferred the stage play, but the film is reasonably good.

Nope, I've never walked out of a film. One cannot have a valid opinion unless one has watched from beginning to end.