@reddog Man, are you me? Everything about this - your height/weight, Mission riding mode, level asphalt, top speed, nearly everything is very close to me.
I had my first and to date only nosedive in December and messed my leading shoulder (fractured ball at the top of the humerus) up bad, still healing.
The only difference is that I think I overaccelerated from dead stop (I was not cruising when this happened, I was starting back up from letting pedestrians cross a crosswalk in front of me) - I never felt any pushback (and I have felt it before, and I heed it), just went straight down to pavement.
I wish I knew for sure if the board was on post-crash, but I don't remember, it was a bit of a blur. I was afraid I was going to throw up or black out from the pain of the fracture, and trying to figure out how I was going to ride back home in the dark, to get myself to ER. So I didn't do a good post-crash eval.
Wear all the safety gear all the time, kids.
I've switched to Delerium for now since the theory is it may correct rider imbalances sooner than Mission does, since Mission offers that "loose/floaty" feel (which I miss, TBH, since I ride on pavement mostly). I also added Fangs, I think they could potentially have minimized the damage I did. And I really pay close attention to stance now, and always butt my front foot up against the fender and put my back foot on the very edge of the tail.