Handful of marbles through her open window... LOL
BUT! This is the stupidity that we face EVERYDAY we ride, or even drive 4 wheels. Use your Spider-sense to know and predict this kind of behaviour. See it coming, avoid it and or set it up NOT to occur. Foresight.
Just had an argument with my girlfriend about being a smart and truly defensive driver. Most 4 wheel only drivers don't get it. After 35 plus years of riding, it's innate now for me.
Was she right or wrong has no bearing if you're laying mangled in a ditch somewhere. Yes, the cop responded and he seemingly had his revenge. This time it worked in his favour. What's he gonna do, run to mommy each time this happens? Is that what you did when a bully came at you in school?
Lesson here I guess is like all 2 wheel lessons learned. Use EVERY advantage that you have as a motorcyclist. Agility, speed and braking (power to weight ratio), 360 degree field of vision, and small size to fit in and between tight spots. AND now, mount a helmet camera each time out.
Other options not yet recognized would be to carry marbles and a sidearm. MAD MAX style!