[youtube https://www.youtube.com/watch?v=4oHP9tXXEE4%5D
Don't mess with this guy...you'll pay! What do you do if your friend's bike get stolen by some lawless goon? You hunt him down, knock him over, and wait for the police to drop some proper justice on that fool. That's exactly what this guy did when he saw someone take off with his friend's ride.