The story behind that wreck was this:
The pro rider, Adam Brayton, crashed further up the track fairly hard and couldn’t finish his run so this bloke volunteered to take his bike back to the pits. Instead of pushing back up the steep, stupidly muddy track he decided to ride it to the bottom...Most likely drunk (Like most other spectators this far into the day) and encouraged by the crowd, he tried to show off/ride fast…
PIP