I've gotten better at reading body language since then, and looking back, I know that she was incredibly uncomfortable. I wish more than anything that I had done something. That I had at least said something. Even if it didn't make a difference in his behavior in the future, I wish I had let her know that somebody was looking out for her. That somebody, even a virtual stranger, knew that what he was doing was not acceptable, and that it's okay to stand up to people who do shit like that.