My experience also involved a motorcycle. I was hit from behind by some ahole in a green caddy. He barely hit me, but it scared the crap out of me. To make matters worse, we were going through a pretty sharp turn, and the impact caused me to head into the direction of the concrete center divider. I freaked out and jerked the bike away from the wall. I over did it though, and sent the bike into a skid. I knew I was going down at that point, so I tried to jump off so the bike wouldn't crush my leg. I did it, but I landed right in the middle of the road. I almost passed out from the impact, but I held on.
I can't tell you how weird it felt to be moving 50mph or so with nothing around you. I traveled about 200 feet or so on my stomach and hands. Thankfully, I was wearing my leather that day. All I could hear was the squeal of cars hitting their brakes. When I looked up, I saw a car right over me. He somehow managed to stop just before hitting me. When I was finally able to get up, I saw 20 or so cars twisted in a 100 different directions. I could not believe it.
The guy who just missed hitting me got out of his car and called 911, while the woman he was with took care of my head. I had a gash in my forehead about an inch long, and a cut under the bridge of my nose. It was nothing really, but it bled a lot. I could barely see out of the eye on that side, because the blood kept falling into it. The woman went back to the car and made a bandage out of a tee shirt. The boys in blue got there in what seemed like seconds. The younger of the two cops said something like S@#% you're alive. I thought we would have to scrape you off the highway. I thought it was funny as hell, but it pissed off the woman. She went ballistic and really tore into him. It was great.
My bike was a mess, but it still ran. I thanked the two strangers & offered to pay for the tee shirt, but they declined. The cops wouldn't let me go until the emt's checked me out. It took them over 20 minutes to get there. They wanted to take me to the hospital, but by then I was fine. I wasn't even shaking anymore. I thanked the group, and slowly drove home.