Completely understandable. Unclear if any 'repeated tumbling/interaction between rider/bike etc' could have lined up all the sequences/applications of pressure in correct area's to AD. Again, we'll probably never know,,,
My dad carries a old Korean war surplus 45 wrapped in a towel in the car door when traveling. I was driving them around Houston in their car. Opened the door and the damn thing fell out onto the street,,, "Nice, Dad,,, real nice,,," LOL!
I wasn't worried about AD as I know the weapon and my Dad,,, just not real happy about his 'method of carry'. (With my luck, a cop would see it and then we'd have some 'splainin to do! LOL!)
FWIW, if you ever see my dad's 45, you won't live to tell about it. Other than that, unless you are family/close friend, you'll never see or hear about it. Just the way it is.