Asian people are scary because they know Kung Fu

I was walking toward the entrance of the Valley of the Queens a couple days ago with my tourist group. This teenager in the merchant area followed me along asking if I was Chinese. I kept saying ignoring him but he kept talking to me, and it was starting to get annoying.

Eventually he says, "do you know Kung Fu?" I turned and looked at him and said, "if you keep following me I'll show you". I don't know if he actually understood, but he turned around suddenly and went to approach other tourists. The guys around me laughed.