Squirmer: "Are you telling me I have to put my pistol away before I can push a button? It's a one-handed weapon, but apparently my left arm is paralysed ..."
No, your attention is elsewhere, not on the pistol. And you would be surprised just how innacurate your left hand can be. I was trained to fire a pistol with either hand as well as in the weaver and modified weaver stance. When your attention is on something else you have to change mental tracks bring the weapon up and aim -- or you can blaze away -- just don't expect to hit anything that isn't right on top of you. And who says you don't have control over your actions? You just have to think and be a bit more cautious about when you drop your guard...