A trucker and a Mercedes driver had a dangerous game of cat-and-mouse on the M25.
The flat bed-lorry, with a white van on the back, veered into the inside lane of the 70mph motorway.
The manoeuvre forced the black Merc motorist to slam on their brakes.
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The car was forced into the slip lane leading off onto the anti-clockwise second of the M25 onto the eastbound M40 towards London.
The truck then went into the slip road too, before going back into the inside line and then briefly, the middle lane.
The Mercedes driver then tried to get back into the inside lane before being forced back into the slip lane.
The orbital motorway was packed with other cars at the time.
The 40-second footage then came to an end.
It happened on Tuesday (4 Feb) at Junction 16 of the M25, near Denham, Bucks.
It was captured on the mobile phone footage by a shocked passenger in another vehicle travelling behind.
Locals fumed at the foolish behaviour which could have ended in a pile-up, as reported by Need To Know.
Carla Wiland fumed: “What is this nonsense?
“Imagine driving, minding your business, and then get hit by one of these.”
Richard Lee added: “These are standard numpties on the road.
“They’re everywhere these days.”
Maureen Dalton said: “Honestly the driving in this country is getting worse.”
Another claimed: “The Merc probably started it.”
A fifth said: “Standard UK road behaviour now.”
Thames Valley Police has been approached for comment.
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