Yeah, for me, I think it would be some sort of physical altercation. I'm a small woman and often people (often male) like to try their luck with me by either invading my personal space or physically putting their hands on me. I've been tempted to knock some of them out, but have resisted. That being said, I'm small, and if I were to strike back, well, let's just say they'd get a very unpleasant surprise.