What's the Weirdest Sign A Girl Liked You?

Besides her frequently using my lingo whenever we talked and mimicking my body language often times, this girl who liked me once just stared directly at me when she came in the room. Like straight up right in front of me when I was sitting, it was really weird in retrospect.

Another time I was talking to a female friend and in front of both of us, she asks "are you flirting?" So embarrassing..