Really it's like high school: moving to a new school, finding the class bully and picking on him. No no, not standing up to him. I mean bullying the crap out of him. Even though he spends all day doing the same to others and you'd think he could take a joke... nope. He gets super serious about it, nearly ends up with tears in eyes as he's screaming at you, and never ever forgets about it. :-P
It's one thing to dish it out. It's another to take it. Most folks fail miserably at the latter.