-Wall-E winning Best Animated Motion Picture
-Heath Ledger winning Best Supporting Actor
-Slumdog Millionaire winning Best Screenplay, Best Original Score, Best Director, and Best Motion Picture (Drama)!
Seriously, Tropic Thunder was fun, but I would have been pissed if Tom Cruise or Robert Downey Jr. won that one.
And anyone who hasn't seen Slumdog Millionaire yet really needs to. I highly recommend it. :)