Can we just clear up, he was not doing 120mph. He was doing about 30-40mph in that video. The only thing it could hit in the event of a crash is a truck trailer, and they tend to be built a little stronger than a bike, they can take it.  Also endangering the public? What public? The road was empty.  There were exactly the same number of people in front of him as Martyn Ashton fannying around on his road bike, none! The only people nearby are wearing leathers, so they're not public, they're other bikers who know the risks. They've clearly all gone to a quiet little back road to have a play and break the law in as safe a way as possible. Not something that most bikers bother with when they want to play.