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This is the terrifying moment a car crashes into another vehicle on a busy main road before careering off in another direction and ramming into it again twice.
Dash cam footage from the A38 in Plymouth at around 11am on Sunday shows a black Seat deliberately smashing into the white Ford beside it in moving traffic.
The Seat then shoots off in another direction before returning to the same car to ram into it twice.
Police arrested a man, 21, from Plymouth, on suspicion of driving while unfit due to drink or drugs, possession of a knife and criminal damage. He remains in custody.
One woman involved was taken to hospital for neck injuries.