A lot of the time, it can be written off as, “normal people don’t know this, so why would my character?” But it’s also rarely if ever portrayed. For anyone not familiar, if you point a gun in someone’s face, there’s a good chance that the part of their brain that processes your speech has now shut down. This is a big reason why cops pointing a gun at someone and then giving orders is bullshit. A lot of the time, you just cannot hear the person talking to you.

I think the closest I’ve seen to this on screen is a POV shot looking at the gun with a shallow depth of field and the person holding the gun is talking, but it’s really muffled. Honestly, I’ll take it. It’s not like people can’t hold a conversation while at gunpoint. It’s just that not everyone can all the time.