From what I've heard, in the event of a forced landing or impact, the safest place to be is above the wings, since that is the strongest part of the aircraft. Plus at least one set of emergency rows is located near there, so you're within a few rows of the exit.

But if the plane blows up or breaks up in air, sometimes it's best to be in the tail section, which escapes the worst of the disaster. There's usually an emergency exit somewhere in the back too, so you're a couple rows from escape as well.

And if someone tries to hijack the plane (the operative here is "tries"), well God help that poor because he's gonna get his kicked by the passengers...

The same goes to anyone who tries to say Hi to his friend Jack.