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This is the dramatic moment a knifeman is thrown through the air after a pedestrian tackled him from his getaway bike as he tried to flee police during a city centre chase.
Muaz Tarafdar, 20, was smashed to the ground after trying to escape from the scene of a fight outside a hotel in Cardiff.
The video footage was recorded by a bystander on the street and shows Tarafdar cycling away towards a set of traffic lights, before he is knocked down by a man in a blue hooded jumper.