I really enjoy firearms. At the same time, they do scare me a little. I treat them gingerly and I always assume a gun is loaded, even after I have emptied it and checked it thrice. A little fear is a healthy thing. Some people will say it's just an object, nothing to fear, but I guess i just have it lodged in my subconscious. And I grew up the kid of a cop/FFL and was constantly around firearms- shot my first M60 when I was 12.
I feel the same way about cars. Well, not quite. I don't care for cars beyond their ability to get me between two points. But I do consider them exceedingly dangerous and drive as carefully as I may, to the general unhappiness of all those passing motorists. A car is a deadly, deadly weapon.
If you assume that both a car and a gun can kill you a moments notice and treat them with that respect, you'll never have a ND. Maybe an AD, not an ND. I have never had an ND and I have never had an accident on the road (I I have put 350,000+ miles combined on 4 different cars).
Rule #1 is the key.