I was deer hunting once when I was young.12 gauge buckshot or slug, I can't remember. I thought I heard one coming so I shouldered the gun and aimed it in the direction of the sound. Couldn't see anything, but I clicked off the safety. No deer ever appeared. So I sit the gun back across my lap.
Time goes by and I hear some more stirring in the leaves. I get real exited again and stand the gun up with the butt of it on my thigh, barrel pointing at the sky. I'm about to shoulder it when BOOM! My dumb arse never put the gun back on safety and I touched the trigger when handling the gun. Almost crapped my pants. That was over 15 years ago. I still think about it now when handling weapons. I was lucky I didn't end myself that morning.
You definitely have to keep your wits about u when handling weapons. It can happen to anyone! Even the most experienced handlers slip up sometimes. Be careful!
You were lucky. Anyone who thinks they are beyond an AD is a fool. Anyone who takes every safety measure EVERY SINGLE TIME he picks up a firearm is wise!