Maccas fracas caught on camera

An ugly incident in the drive-thru of a McDonald’s in western Sydney has been filmed by astonished patrons waiting in their vehicles late last night.

One of the fighters can be seen leaving the passenger seat of a car to face his much larger adversary, only to be slammed against the car and beaten to the ground after a verbal stoush.

The man then stands up, collects his food from the McDonald's window and returns to the car.

McDonald's staff seemed to remain calm throughout the ordeal, coolly serving passengers who recorded the scuffle from the car behind.

Mt Druitt police are now investigating the incident and are urging all witnesses to come forward.