This is when your Go-+Pro really comes into its own.Reminds of the time of time I was driving back from Yuma late at night.
Had a vehicle chase me down, cut in front of me and brake check me twice down to around 30 mph after he chased probable going over 90 mph to catch up to me so fast.
Fortunately, I remembered that guy had light up a car in front of me a few miles back. I just laughed at the futility of a trying the brake check a motorcycle and turn off at the off ramp and waited a while before going back on.