Paisley said:Some re-enactors at a ranch here in Colorado pointed out that if you wear your gun belt around your hips, your guns fall out when you mount a horse.
ah of course, the infamous buscadero holster.
As far as I know, this has no historical parallel, and was invented on a movie set to facilitate the legendary "quick draw" — another hollywood contrivance.
Gunfights in the real west were about who could aim the best, not who shot first, and more often than not, involved drunk men in dark saloons with shaking hands shooting at each other through clouds of smoke.