An interesting video clip, but I didn't watch all of it. I'm unsure what is being ridden though, it obviously has an engine but is it a motorbike or a bicycle fitted with an engine?
It reminded me of a motorcycle accident I attended a few years ago. A rider and pillion hit a car which had turned right across their path. The car had been virtually cut into two halves, there was a set of leathers dumped in a heap at the side of a tree with the helmet placed along side and two people, who i assumed were the rider and pillion being worked on in the road. I couldn't find any sign of the car driver.
When I enquired who I would by flying to hospital, the doctor at the scene pointed to one heap of blood soaked blankets and said the car driver, then pointing at the other said the pillion has died. Curious about the rider of the bike, I was just about to ask when it dawned on me that the discarded set of leathers dumped by the tree and the nearby helmet actually contained a body and a head. The dead mouse a few meters away from the leathers / rider wasn't even a dead mouse either.