Sabie, with your three videos, in the first two the rider is going insanely fast between the traffic, hence not being able to avoid the collision, and in the last one I reckon that's just plain sod's law, bad luck! In the first two, if the riders had been doing a reasonable speed, not playing crotch-rocket pilots then they would have had plenty of time to avoid the lane-changer, and I think that God himself would have had a hard time avoiding the last one!