This is the moment an extreme road road rage motorbiker found himself trapped on a bus after he boarded to remonstrate with its driver who had pulled out in front of him.
His helmetcam footage showed the incident from start to finish - and how he lost his cool when he got off his bike to talk to the driver.
It showed him accuse the driver of pulling out in front of him moments earlier on a wet road and claim the driver had put his life in danger.
He fumed: "Do you know what the give way line means?" - before adding: "You f*****g wimp, you f******g c***."
The man added that he had the bus's licence number and driver number - but the unphased driver replied: "It doesn't matter."
The irate commuter then steps off the double-decker and then re-boards to continue his row as bemused passengers watched on.
But while he was in the middle of his rant on the 295 Clapham Junction bus in London, the doors closed and the suddenly bus took off from its stop.
"What are you doing? What are you doing?" the motorcyclist fumes.
"Why are you getting me inside to close the door, are you serious? Why are you trying to entrap me?"