I’ve seen some people play with the programming of BMWs. I was really impressed with one I saw that had 3 levels of lighting. It didn’t affect the actual brake lights but instead utilized the rear fog light. Normal braking was just the normal lights. Moderate braking turned on the rear fog lights. But when he slammed the brakes, the rear fogs flashed.

I was also pissed to be in traffic that allowed for all 3 modes in a few miles.