"Well, don't you look perky"

I said this to a girl at the grocery store the other day. She looked about 17, wearing a trucker cap and tight jeans, cute face. WHat/ev. Anyway, I say this to this girl not to open her or anything -- I just wanted to say it. But her expression was priceless, sorta like a deer caught in the headlights. I didn't stick around to start a convo though -- the whole thing was just an exercise in over-compensation through rudeness. At that moment the only other thing I would have said to her was: You know, I can teach you to gain psychic powers while having mind-blowing sex.