Don't you usually have to cock every handgun though before you fire.. well not HAVE to, but it'll help w/ the first pull on the trigger? Unless you mean the guy is pulling an imaginary external hammer on the glocks that's making the sound.. Keyword is a traditional for the 1911 part, isn't it? I'm not much of a 1911 expert though.
You don't have a cock the gun as an additional step unless it's a single action pistol like the old cowboy revolvers. On a semi-auto, when the slide is pulled back and a round is put in the chamber it gets cocked. If there's a hammer the hammer comes back, if there's a striker it's back and you don't see it. Some guns like a Beretta 92 have a de-cocker. De-cocking the gun still has it in double action mode. You can cock the hammer if you want but the gun will fire if you just squeeze the trigger.
You see in the movies where someone racks the slide to load the chamber. This action cocks the gun, then later if the gun has a hammer they'll re-cock the gun. Why didn't you hear them de-cock the gun after loading it, or why didn't they just leave it cocked?
The first trigger pull weight doesn't mean shit if you know how to smoothly squeeze a trigger. It's a whole 10 lbs on my Sig P239. Revolvers just take practice to learn how to shoot in double action mode. It's not a requirement to cock the hammer each time if it's a double action revolver.
I said traditional 1911 because I expected someone to chime in about Para Ordinance's 1911's if I'd just left it as all 1911's. Para Ords are double action. 99% of the 1911's made are single action and are designed to be carried cocked-and-locked. When you want to shoot with a 1911 you just thumb down the safety. It's more dangerous to carry an unloaded 1911 because the safety immobilizes the slide in addition to the trigger. When the shit hits the fan you don't want be stuck trying to rack the slide with the safety on because that slide isn't going to budge.
And the hero has to be safe, don't want to run around with a loaded shotgun that's ready to fire, that's how accidents happen. Plus, it kind of scares the bad guys when he cocks it. Don't wanna be rap stars and gangsters do the same thing, they cock it, point it side waaaayz, and put dat shiet up to yo face.. Thought it was in the discovery channel.
There's jack shit about firearm safety in the movies. Safety is not the reason why the hero goes around with an unloaded gun. Look close and you'll see how often the actor has their booger hook resting on the trigger. It's a trigger, not a finger rest. The god damn finger stays off the trigger until it's time to shoot. The gratuitous cocking of firearms is done for effect and it's retarded.