The footage was captured on a country lane, but it is not clear exactly where in the UK.
At the beginning of the clip, the car speeds along the road and the engine can be heard revving.
The passenger then says: "Get close to him and I'll knock him right in the hedge. Slow down to his speed."
Shocking footage shows a thug reaching out of a car window and pushing a terrified cyclist off the road.
Zooming up beside the passenger, the car comes dangerously close to knocking him down with the wing mirror.
It is then that the passenger wrenches himself through the window and uses both hands to push the cyclist.
Unprepared for the shocking assault, the rider ends up veering off the road.