Fast food customer is beaten to the ground in viscous attack

A fast food worker was caught on camera assaulting a 'disrespectful' customer and muttering 'I'm gonna kill you'.
The footage shows the employee unleash a barrage of punches on a customer in American burger chain Wendy's. It is unclear exactly where in the U.S the fight happened.
The attacker, who is wearing an apron, pins the victim to the ground and rains punches down on his face and head with both fists.
A woman can be heard shouting 'Somebody call the police' as the two roll around on the floor.
Someone wearing a Wendy's baseball cap moves into shot as the customers and fellow employees look on helplessly.
When the victim tries to hold his attacker's legs, the man grabs a tray of drinks and slams it down.
It hits the victim in the face, covering him with ice and fizzy drink, as witnesses look on screaming.
The employee then delivers a final kick to the stricken customer.
As he walks away he mutters: 'I'm gonna kill you n*****.'
The video was uploaded to LiveLeak and YouTube under the caption: 'Wendy's employee beats up customer for disrespecting him.'