You are talking about a situation where you know the tree is going to go to green in a few seconds, guaranteed unless there's a power failure.
Try to maintain the physical restraint of not shooting plus the mental attitude of ordering a perp to the ground and all he does is 'not move a muscle and say to you, "Take it easy, take it easy, don't shoot me, don't shoot me. I'm scared, Man. Take it easy, take it easy, don't shoot me, don't shoot me. I'm scared to move!"
The whole while you are ready to pull the trigger. Try that for 60 seconds and you'll watch your hands start to quiver because you know you are too close and that he could kill you while you are killing him. Death is about to knock on your door with a sledge hammer and you know it.
You will be squeezing the grips so hard that your fingers will hurt, your biceps will ache wanting you to relax just a tiny bit. When I see the white go out of your knuckles, that's when you are in trouble!
Add in the .05 of a second for the hammer to fall and I'll win the bet. Sure I may have a hole in me, which I doubt but you will have a whole in you too.
That's not the scenario we want as gun owners, is it?
I'm going to ID you as being someone other than a guest or family member, and then you die. I'll worry about the legality of my actions later.
As for your machismo... you might, might from sheer dead weight intertia, manage to stick me once, but I guarentee you will do nothing after that first lunge accept bleed out into the carpet.