In a gunfight it appears that good guys draw faster than the bad guys but usually die because they wait. This article/video in the Guardian explains all. Apparently "...the Nobel laureate and quantum physicist Niels Bohr was so intrigued with the puzzle he came up with a theory: the one who draws second moves faster because he reacts without thinking." A team at Birmingham University set up some tests to prove/disprove the theory. As usual, Hollywood twists the facts - the one who draws last gets shot. Still, it wouldn't be the same if the good guys lost in the movies.