in 3 of my 4 crashes, one instant I was riding along, the next, on the pavement and bleeding. only one happened at a slow enough speed to be able to tuck and roll...
most recent one, got a concussion and Grade 3 shoulder separation...but, since I'm missing 3 hrs of memory surrounding the event, not sure what positions my head and hand/arm were in...
it's not like I was piloting a plane at 10,000' and had a few moments to figure out where/how to land...