I do agree the that rider was doing a dumb maneuver on a couple accounts, but also agree that does not obviate assault and battery even if the psycho's original intent had been just to swerve and scare vs. actually maim. I kinda doubt that but we've all seen that behavior I'm sure.
At age 70ish now with up to 15 years (no fewer than three served) I hope that if/when he gets out they issue him a permanent bus pass and no DL; although allowing him a moped would also be somewhat poetic.