Shocking footage has emerged of an angry driver beating up a bus captain after the captain reportedly complained of the motorist’s bad driving.

Mercedes driver Leung, 37, is reported to have cut in front of the route-112 NWFB bus at around 7pm near 789 Nathan Road last night, requiring bus captain, Keung, 39, to brake hard to avoid the car. Keung then alighted from the bus and stood in front of the Mercedes to talk to the car driver.

According to footage captured by an increasingly terrified top-deck passenger, driver Leung then got out of his car and became angry with the bus driver, pushing Keung to the ground and kicking and punching him repeatedly.

Another driver then intervened.

Police later arrested Leung for assault, while bus driver Keung was taken to hospital with cuts, bruises and a broken wrist.

A Mercedes driver kicks a bus captain after the bus driver complained about his bad driving