Travis Pastrana teaches some of his buddies how to do a backflip.from the film \"Nitro Circus\"\n\nriders include:\nTravis Pastrana\nKenny Bartram\nChuck Carothers\nSpecial Greg\nMad Mike Jones\nand some of Travis\' friends 199, Backflip, Carothers, Chuck, Circus, FMX, freestyle, Greg, Jones, Mad, Mike, motocross, Nitro, Pastrana, School, Special, Travis