cali... YIKES! what a scary day... I'd have been a nervous wreck too! I'm sure glad the DH was able to stop and was OK... was he on his new bike??? UGH! I can only imagine how ticked he woulda been if he crashed it...
it might be worth it to get those walkie talkies that you use for snowboarding/skiing just for riding GMR... I know you guys ride it fairly often... and they have lots of other good uses too! My ex and I had them for snowboarding tho, as we had no cell svc on the mountain either... that way if we got separated (which we did more than once) we'd have a way to be sure the other was safe...
Man, I hope the bloody guy was OK... bet he just wanted to get the heck off the bike by then... it was good of you and the DH to check him out and try to help!