When drivers swerve and brake to affect my safety on the road I bide my time until it's possible to smash their window or wing mirror off. I can wait 15 or so minutes until they forget all about putting my safety and life at risk. Maybe that's what this plonker needed but he seems to have learned a more lasting lesson.
Not the most handsome or clever individual and probably not the most thoughtful or forgiving. Hang him.