Bank Panic

Bandits are holding up a bank and have taken people hostage, and as a gunslinger, it's your job to shoot them. The bank has 12 doors, and the bandits are behind each one of them. When they pull a gun out at you when you open a door, you have only a few seconds to shoot them before they shoot you. If you shoot them too early (ie: before he sticks his gun out at you), it is considered unfair, and yo...