The story about everyone jumping on their bikes and going for help doesn't make a lick of sense. If that's the case, why didn't they go back to the scene? Why did they need to leave if it was on a freeway, there's TONS of people who stop at those kind of scenes and nearly everyone has a cell phone these days...
I don't know what happened, all I know is the story they're feeding you doesn't make sense.
Having worked quite a number of auto and motorcycle accidents, I know people like to make **** up, on both sides of the issue.