I was out driving earlier and was driving down a busy road, stop start traffic. A cyclist was between me and the car in front.
As traffic started to clear the cyclist moved along the inside of the car in front and held on the car's wing mirror. We were going about 15/20miles an hour when the car in front slammed on their brakes and the cyclist wobbled and let go. I stayed back as I wasn't sure what the driver would do. The driver and cyclist shouted at each other then drove/cycled away.
I've had cyclists do this to me but I just put on my hazards and stop accelerating, not braking and they usually let go. I would never brake like that. I have a dash camera and it shows what happened and the car's registration number. Aibu to contact the police? Sending them the video?