I believe that must be Ronny Renner in Marc Coma apparel doing the stunts on a 450RR. Nice publicity ploy, but still a fake. Coma didn't appear THAT comfortable on moderate height jumps, so they simply put some Coma apparel on Renner and let him fly that 450 through the dunes. I may be wrong, but that FMX body language belongs more to Renner than Coma.
Nice one, KTM!