I do it to see if anybody noticed my bad shot.
He also did that move where he pulled the gun close to his body before looking both ways.
One of the nice things about the revolver is that there is no need to look behind you. The recoil shield is a perfect rear view mirror!
Bob Wright
...............if that the case it makes no sense when they have no rounds left in their gun. I don't know why they do it but it sure looks dumb..... I don't see everyone do it, just some. take a look at this guy doing if you don't what I'm talking about... skip to about 1:10
If you think training will takeover then why not practice firing at targets behind you instead of just looking back.....
El Presidente
One combat pistol drill is the El Presidente drill, developed by Jeff Cooper in the 1970s and published in the January/February 1979 issue of American Handgunner magazine. This is used as a benchmark to gauge a shooter's skills, as it tests the draw and reload, and requires good transitions and follow-through.
The shooter starts with six rounds in a holstered handgun, and a spare magazine or speedloader with another six rounds
The shooter begins facing directly away from the targets, often with hands clasped in front or over the head.
Upon the starting signal, the shooter turns and draws, fires two shots at each target, reloads, then fires two more shots at each target.
You obviously have very little training if you've never heard of the "El Presidente".
It's a standard training exercise in every basic combat handgun course I've ever seen.
It's a standard part of the IDPA Classifier (Stage 2 String 3).
http://en.wikipedia.org/wiki/Combat_pistol_shooting#El_Presidente