... making an inviting target for that one bad guy who will inevitably jump out of the closet and grab for their weapon. You have to give the bad guys some kind of a chance, right? It's in the Constitution.
Meanwhile, In The Real World ...
In the law enforcement biz, there's actually a term for going in gun-first: flagging. It means prematurely announcing your presence by shoving your gun barrel (or any part of your body) into a room where everyone inside the crack house can see it. If you watch actual police approaching a doorway (hopefully not yours), you'll notice they keep the gun close to the body, specifically to avoid the close quarters gun-fu you've seen play out in a hundred action movies:
Beretta / YouTube
2 Calm, 2 Collected.
Then, they proceed to stay outside the room until they've had a chance to make an arc around the outside, peering in at every available angle to see as many corners as possible before charging in. And even then, there's no running straight up to a suspect to shout them into submission. Teams will stay close to the walls and gradually close in. The idea is that everyone can see the remaining hidden corners simultaneously, since bad guys have been hiding in corners literally since the invention of square rooms.
And, obviously, you don't want to loudly announce your presence ahead of time. This is due to the fundamental, yet often unnoticed, difference between Hollywood police work and the real thing: In the case of the latter, a quiet, uneventful, straightforward arrest is the whole point. If the situation devolves into chaos -- even if it involves badass spin-kicks and dudes jumping through plate glass -- somebody has fucked up.
Warner Brothers Pictures
Loose cannons see unemployment by day two, no matter how entertaining they are.
Good police work shouldn't look like an action movie, for the same reason you don't want your colonoscopy to look like a direct-to-video Rob Schneider comedy where he plays a doctor. Or a horror movie. Or a fetish porno. You don't want that to look like any kind of movie, really.
For more ways Hollywood is bullshitting us, check out 23 Lies Everyone Believes About Violence (Thanks to Movies) and 20 Lies You Believe Thanks to 'Realistic' Movies and TV Show.
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