As if everything else before that was ok -- lol.
I don't go to movies that much. The last time I had a "problem" with someone was some guy and his kid for Return of the King. He sat next to me. He wasn't horrible or anything, but everytime something was about to happen, he'd tell his son what was going on and he was dead wrong. Like the scene at the end when everyone was headed to the gates of Mordor, or whatever that scene was at the near end, he told his kid that they were going to sneak up and ambush the bad guys (Not Frodo and Sam mind you, but the remaining soldiers.)
Usually if some idiots are behind me I just sit up straight and block their view. I've also wanted to trip kids running up and down the aisles, but I always sit in the middle of the rows to avoid assholes getting up every 5 minutes to leave...