"Unlikely"? It's impossible.

Oh come now! It certainly is POSSIBLE. Chewy could wrestle him to the floor and then NAIL the helmet onto his head. Then frog-march him out to the parking lot and put a mirror on his bike. Follow him home while keeping a Glock pointed at his skull. If he does anything stupid or reckless fire a "warning shot" into his brain. BEHOLD! A safe bike rider!