Oh I've seen a lot of movies where a Glock, and other autos, are pulled and you hear a "click click" (supposedly the safety going off) and (as another poster said this is not possible on a Glock) but it sounds more like they are cocking the gun hammer back.
Also, I was watching part of Dances With Wolves last night on TNT. One scene has the Indians rescuing Kevin Coster from the yankee army. One of the yanks was a mean sergent who slithered away from the ambush. He is crawling under the wagon holding a Remington .44. He crawls out from under the wagon and floats down the creek to get away. By the time he gets to the bank of the creek and crawls up to some horses and encounters an indian boy his revolver has transformed into an 1851 Colt Navy
Speaking of other gun changes. The first Batman movie back in 1989 by Tim Burton has a scene where Jack Napier becomes the Joker by falling into a chemical vat. Napier (a mob right hand man) is being pursued by Batman and the police through a chemical factory. Between the scene where he shoots a corrupt police lieutenant for double crossing him and the time he falls into the vat, we see the gun in his hand go from a colt, to a smith and wesson and back to a colt. (it's hard to tell what model because the scenes go by so fast)
Also, in the GOod the Bad and the Ugly, in the end when "The good the bad and the ugly" are facing off, you see Lee Van Cleef's gun in holster with bullet cartridges lining the belt of his 1851 Colt Navy (sometimes seen as a Remington
) however, even though his belt is lined with cartridges (something they really didn't have during the War Between the States
) if you look at his gun, you will see it has precussion caps attached to nipples on the back of his cylinder. The revolver in his holster ball and cap not cartridge.