As a companion of the hero in a fighting-based story, don't get into a fight with the big bad guy. Your friend is destined to beat him; your only role in such a scenario would be to get killed.
I don't often get to the cinema. That's why when I review films they're generally at least a year old. I wanted to see The Phantom of the Opera when it came out last year, but didn't get around to it. I regret that, because even without screen size considerations, I could really have done with having it nice and loud without worrying about annoying the neighbours.