Police RTA investigators have told me that in most cases of a single-vehicle m/c accident, where the rider has failed to take a bend, the bike could in fact have made the bend if the rider had reacted by correcting his/her line but they have given up by then.
I've been in trouble where I KNOW I am going down but somehow pulled it out by keeping a steady throttle and committing to the turn. That will wake you up.