You should have done something rude back like ripped his belt off and pulled down his pants. Then you could put his penis in your mouth and sucked on it. He'd be so pissed that he probably would grab the back of your head and push his dick deeper into your mouth until you gagged. You'd have to get back at him though,so make sure you give him lots of eye contact while you do it, he'll hate that. Then to be super rude at the end, after he cums in your mouth, you should swallow it. He'll be so pissed that he can't get it back.