The Gunman's Offer
You are a prisoner about to be executed by a gunman. As you move into position the gunman takes a six-chamber revolver and places inside two bullets next to one another. He spins the chamber, locks it in place, aims and fires...and nothing happens. At this point he tells you he will fire one more time and if you are still standing afterwards you are free to go. He gives you two options- either fire again, or spin the chamber and then fire.
Which option provides you the best chance of walking away unscathed?