At a black tie dinner/dance when I was 18. I started by getting very drunk and excitable.
A stranger was pointed out to me as a bloke who "does Taekwondo" (however the **** you spell that).
I was secure in the knowledge that my mate Darren the Judo 1st Kyu was right behind me, and would no doubt stop things before my head got stamped on. I interrupted the poor blokes conversation, by holding my hands out in front of me, palms open and quoting Big Trouble in Little China:
"See this, there is nothing"
Slapped him in the face
"That's how it always starts... very small."
Smugly looked behind me, only to find no Judo hero to be seen. :5shocking
Gave a polite smile and confused look, and managed to move away before he recovered from the weirdness of it enough to batter me.