Maybe the question isn't taken seriously, because mostly adults post here and your dilemma does seem really childish and trivial.
As an adult myself, I would hope I don't get to meet such people who want to humiliate me, but if I did, I'd hope I would just look on that person as the idiot they are and just forget about their actions.
No doubt, if you try to humiliate this person, he will do it back to you and then you back to him. You could both be going round in circles looking for best humiliation tricks, that real life will pass you by. Just try to get over it would be my advice.