I guess I'm an idiot...
Using a single action revolver (Uberti replica of Colt .45) the balance is just right to twirl!
Being single action, if the hammer is down, (even IF LOADED) the firearm is NOT going to discharge if a finger inside the trigger guard presses the trigger ... it's already back.
Being someone with halfway active braincells, noticing the balance of an EMPTY revolver and spinning it into a holster was a heck of a lot of fun!
I don't suppose this is really any more dangerous then dry firing at the TV set while in an apartment complex.