I'm going to tell a dude at the movie theater to shut up
Why would you want to tell someone to shut up at a movie theater?
Because all they do is try to crack jokes outloud
It's better to ask them politely to be quiet instead of yelling at them.
But he's being so obnoxious.
I know but you could end up in a fight if you yell at him. Then the movie will be ruined for everyone.