Bike Racers Miss Riderless Motorcycle by Inches [Video]
This phenomenon is strictly related to the very dynamic of these machines and the gyroscopic effect of the wheels. That's why we sometimes get to see a bike whose ride fell off still riding forwards in a straight line, until the speed decreases, starts circling and finally flips.
However, when this thing happens on a racing circuit it may pose a huge threat to the other riders, just as we can see in this video. Luckily, the rest of the riders managed to brake and avoid hitting it... especially as the bike corners on its own and crosses the asphalt strip once more.