This reminds me of one of the strangest conversations I have ever had in an airplane. A student once asked me while we were flying, what I would do if someone tried kill me. I then said that I was trained to recover the airplane from any attitude and that he should not worry about that. He then said, No I mean if someone really wanted to KILL YOU!!. Uh, if you mean intentionally crash the airplane, probably not much. You're a pretty big guy and I probably couldn't overpower you and by the same token if I wanted to kill you there isn't a damned thing you could do about it. I guess when we both get into this airplane we have to trust that we aren't going to try and kill each other.