Pistol twirling and gun safeties
 

Make no mistake, I am well aware that twirling a pistol that is loaded and cocked is unsafe and not recommended, since it violates the gun safety commandments of "always treat every gun as loaded" and "never point the barrel at something you do not intend to shoot." Even so, I'm driven to wonder just how unsafe this is on different types of pistols.

The stereotype of a cowboy twirling his Colt Single Action Army (which Revolver Ocelot from the Metal Gear Solid series heavily plays into) I suppose is (relatively) safe so as long as the hammer is not cocked and the cylinder under the hammer is empty. When twirling a double-action revolver with the safeties off, however, how likely is it for the centrifugal force on the trigger when pistol-twirling to cause an unintended discharge?

I'm also puzzled about how much "safer" it is to twirl a Glock-type pistol (which has no external safety) vs. a more conventional pistol with a grip safety, manual safety, etc. Would the Glock be more likely to unintentionally discharge (since all the safety devices are disabled by a strong enough trigger pull) while pistol twirling, since it's not normally possible to disengage a grip safety or manual safety when twirling a pistol?

For a single action revolver, it is unlikely to accidentally have the weapon go off from pulling the trigger if you don't pull the hammer down even if the chambers are full. There's a particular weight with a revolver over all other pistols. A glock's weight would be off if you twirl it in your finger