A cyclist wielding a huge 'zombie' knife tried to attack a motorist after an accidental collision in broad daylight.

Dashcam footage has emerged showing the terrifying moment a young man ran after a Volkswagen Polo on a busy high street in Croydon, before trying to break through the driver's side window with a massive blade.

The incident took place after the Volkswagen almost hit the cyclist while trying to pull out into traffic.

Apparently enraged at the near miss, the cyclist jumps off his bike and gives chase as the panicked driver, 19, careers into another car, bringing him to a halt.

The man then pulls out a blade appearing to be more than 10 inches long typically used for survival or hunting purposes.