[ericHosick]

It also looks like, in an accident, the lights on the Tesla start to flash.

[pilom]

The lights wouldn't appear to be flashing, they are blinking at a faster rate than the human eye can see and thus just to a person appear dimmer than they would if they were on full power.

Most dimming of LED's is done with this super fast blinking technique because LED's can be either on or off unlike incandesant bulbs. https://en.wikipedia.org/wiki/Pulse-width_modulation