There's still way more likelihood that someone in a bike crash has brained themselves and doesn't know what's what, whereas people in cars who hit cyclists can hardly claim any form of brain trauma.
I've not seen the video. Shock would definitely be more of a factor in bike-ped collision than car-ped, car-cyclist. Maybe it WAS nicked? Maybe she was a lunatic and he was trying to clear off? Probably just knew he'd be shafted for it no matter what because he was cycling (sort of).
Yes, it delays possible medical assistance.
There's still way more likelihood that someone in a bike crash has brained themselves and doesn't know what's what, whereas people in cars who hit cyclists can hardly claim any form of brain trauma.