Guy Fieri might be spiking his own hair -- after a knock-down, drag-out with his hairdresser.

It all went down on Saturday after a flight to San Francisco International. Video obtained by TMZ shows Guy and Ariel Ramirez going at it through the open door of an SUV. There are punches, kicks and a bunch of swear words. Eventually, Guy's manager got between them and put Ramirez into a cab.

Apparently the two of them had been drinking on the flight, and the scuffle was pretty much about nothing. Guy's rep says they've kissed and made up, but we'll see when we check out his hair on the next season of Diners, Drive-Ins and Dives. 

WARNING:  Language Alert!  Video may not be safe for work!