My boyfriend is mad at me for not helping....do you think I should have helped?

My boyfriend and I were at a biker bar and he knocked over a bikers bike (ON PURPOSE) cuz he thought the guy was looking at me!!! Well....they dragged him into the nastiest biker bar bathroom i've ever seen in my life and flushed his head a number of times in the toilet. What was I doing? Just watching, like what am I suppose to do, i weight 95 lbs and frankly, HE DESERVED IT!! Now he's all mad because I didn't do anything to stop it, what should I do? Any thoughts, i hate apologizing when I don't think I need to but should I?