Thank you all for your positive contributions to my explanation and theory about what happened.
In answer to additional questions:
~Both my sons are in perfect health; mentally? In therapy. Losing their daddy is always going to be with them - no dad to put the hammer down, no dad to play...
I'm the widow.
To those who actually give a hoot about anybody but themselves: I sincerely thank you for your condolences.
I nearly killed myself on the trails just a couple weeks ago on my son's Blaster. Pretty much the same flipping thing as my husband in his truck.
There was no reason...