"Whoa, shit." She backs up, raising her hands to show it's just her, no harm intended - and then realizing belatedly it doesn't matter who she is or what her intent was at all. It's that she made contact at all.

"Shit." She lowers her hands again, chewing her lip. "Sorry. I, uh." There's not much to say, really, so instead she waits for him to give some kind of sign that he's conversation-ready.