I'm so sorry your DC was in the wrong place at the wrong time. People seem to be so on edge lately. I've noticed increased aggressive behavior towards others in restaurants, shops and on the road. It's so unfortunate. DS1 is also learning to drive now we've had a few stressful moments for sure. Fortunately, more practice has meant smoother driving and more confidence. I've had to remind myself many times to stay calm to keep my hand off the oh sh!t handle. Hopefully your DC can chock this up to a learning how to handle irrational and irate drivers in the future lesson and not be too affected. It's better they encounter these rattling experiences while we are there to explain and guide instead of on their own but that doesn't make it any easier on us.
Mom to Two Wild and Crazy Boys and One Sweet Baby Girl