i saw this yesterday on my way home. no chp/fire/ambulances/other motorcyclists were there yet so i turned around once i got to summit so i can make sure everything that could be done was being done. i was the first motorcyclist there, and i passed a guy on a bmw 1150 gs and told him a rider was down. we split through stopped traffic to assist. when we got there, he knew who he was, where he was, and why he was there (check). when i got to the scene everything was about as good as you can get. there was a doctor and 2 nurses trying to keep him stable and stationary (check). i hope if i go down one day that i am that lucky.
some of what is below is what i "know" based on what the other witnesses said. these may not be fact as i did not see the accident:
the rider was the second of two who were splitting lanes. one car lost control (the driver only had a permit and 2 passengers) spun and hit one car and then hit the motorcyclist. another car was involved but i think just as a witness. the first motorcyclist kept going (but i believe he returned about 20 mins later). the bike was not silver, it was black, iirc. i dont remember the make/model, it was new, and shiney. it was very damaged, to the point the key had broken off. it was still on but i couldnt easy manipulate it to turn it off. it was not leaking gas and it was no longer running (check).
after awhile the chp arrived, then fire, then the ambulance. they did the normal routine and i believe he was able to move their left leg as it appeared he was holding it up, but again, this not because i heard it to be true, but what i saw. i believe his name was "glenn" or something close to that. i stayed after he left in the ambulance to vmc. after the first fire truck left, i confirmed with the chp who was leading the situation that i was no longer needed and i left.
glad to see he was alive, and i hope it was all good news from after he left.
edit: the first thing i thought of was to remember if i had the checklist that i saw on barf before memorized enough. i just spent 2 minutes looking for it to see if i missed anything but i cant find it. if someone knows what im talking about can someone post a link?