Biker Lands On Mattress After Being Side Swiped By Truck (VIDEO)

This is the craziest thing I have ever seen. I had to replay it and pause to see what actually happened.  At first I thought that it might have been a stunt, but it clearly isn't after pausing and re watching it.  What are the odds of this really happening? What I want to know is, why the truck guy didn't come back for his mattress.