Pull over stopping the car as well, give the car driver a good firm slap up the side of the head then ride on .

Seriously though since putting very visible cameras on the bike front AND back Iv found that 95% of cars give me a wide berth. Iv wrapped the cameras in the same hi-viz sticker tape used by the police so drivers can see their being recorded from a good distance away.
However the 1st option also works really well, just don't ask me how I know .