Policeman and the Jumper

Alright, listen up, you chucklehead. You clearly don't get it, which, let's be real, isn't a shocker. You probably still think the earth is flat. The joke is all about the word "pullover". It's something a cop would yell at someone in a car but it's also a piece of clothing. It's a pun, which I guess is a little too sophisticated for you.