I know that "smile". I am an expert in THAT particular type of smile. You look them in the eyes, your eyes wide, eyebrows slightly knitted, and you smile. You smile like you just thought of THE most painful ways to make a person die.. and look them in the eyes with that.

Scares the shifu out of people. LOL When a guy tells me, "You'd be pretty if you'd smile more." I use that trick on 'em. They walk away pretty damn fast. LOL