Who Were the Sea Peoples?

Well, the Prisoner's Dilemma is certainly a useful arrow to have in one's quiver: I once had two students whom I knew had cheated on a test, but without any decisive proof. So I called one of them in alone to my office, implied he was the less guilty party, and offered a reduced penalty for a confession. Man, it took the guy about two seconds to choose "defect."

How often in movie's have you seen two enemies pointing pistols at each other from about ten feet apart, having a stand-off? Isn't the rational action here simply to shoot immediately? (Of course, there are sometimes complications: one guy is a cop, say, and he's not supposed to be shooting first, or the "enemy" is his brother, and he loves the dude, but can't let him leave with the diamonds. But let's just consider the cases without those complications, of which I have seen plenty.) You can hardly expect to play Tit for Tat here, right? If your opponent has pulled the trigger from ten feet away, you are dead, correct? It would seem to me that there is no "threat" that if you shoot, I will too. But perhaps a reader more familiar with firearms than am I will set me straight here. Joe? Bob, do you and Woods ever have standoffs where you each threaten the other with your machine-gun-like wits? How do those resolve?