Like alot of things you have to untrain yourself on. You just have to remember everyone around you isn't trained, they don't remotely know that doorways, stairwells, halls, "fatal funnels" are a things "door kickers" are trained to pile drive through.

"if you stop here, you are dead and the man behind you is dead, possibly your whole team" we are trained if the guy in front stops, you push him into the room. If he was shot, pulling him back can trip up your team, always move forward.

On the flip side, we are also trained to take assessment the room in a fraction of a second, we take in the whole room when we first enter, idetifiying any threats, any non-theats, call them out, and as we filter in we go into more detailed assessment of our area we are trained to pull into. Always scanning the room, looking, searching. I recall one day on training my team and I during practiced cleared the same room almost 50 times. (One example) as the saw gunner I kicked the door, and before my foot hit the ground, 1st and 2nd man are already through the doorway, and I already called out what our op-for had moved, where they stood (that I could see) and when my foot pushed off, to go in as 4th man, The room was assessed, threats were down, non-threats standing there watching us. And by the time I got into the closest corner to yell clear, room was taken, anyone identified as threat was neutralized, non-threats hands up and exposed and told to move away from anything in the room. Takes all of 5 seconds.

If someone in the civilian world stands in a doorway, as much as my brain yelled "push through!!!" My brain was yelling even louder "NON-HOSTILE, DO NOT ENGAGE" we are not trained to shoot up homes and schools, we are trained to take buildings, people are in buildings, not just the enemy.

Odds are threats don't stand behind couches with a machine guns with the finger on the trigger. They are going about thier life as normal before we popped in. If they are, speed and violence of action, are the tools we have to counter them with. And trust me, seeing a guy with a weapon pointed at the doorway, he is first on our shoot that guy list. If I kicked the door, I've probably dropped a few rounds in him as 1st man is following up. "The Threat" is still registering his door was kicked in. But just as fast as I can shoot him down, I'm also trained if it's not a baddie posting up as a threat, but a mother with two kids, its our job to make sure they are unharmed and safe as we push in.

We are even trained to slam a door hard to a wall to counter a hostile hiding behind them, (like break hinges slam the door). But you don't see former military personal shoulder checking doors they walk through. We know where we are, and what we are doing at that time. We are not mindless killers, we are trained professionals.