Sometimes, good guys -- or friends of good guys -- go bad; they turn traitor, go too far in pursuit of good, or have stared into the darkness for too long and let it corrupt them. Sometimes when they do, their former friends have to bring them in. So when they leave, the hero will Leave Behind a Pistol. A loaded pistol, with one round in the chamber. And maybe a bottle of Scotch, if you're lucky. The implication is clear. We may then see the hero walking down a corridor. And hear a single gunshot from the room they've just left. Examples of Leave Behind a Pistol include: