A cyclist wielding a huge 'zombie' knife tried to smash a motorist's window during a terrifying rush hour road rage attack in front of stunned London commuters.Dashcam footage captures the horrifying moment the young man sprinted after a Volkswagen Polo on a busy high street in Croydon, before trying to break through the driver's side window in a frenzied assault.The Volkswagen almost hits the cyclist while trying to pull out into traffic which appears to start the confrontation. Apparently enr
