looks like those remote control aircraft you can get with the two blades like that cool photo
Camera Equipment -2x 5d MK II -7d -50mm L USM F/1.2 -70-300mm L USM IS f/4 -100-400mm L USM IS f/4.5 -24.105mm L IS USM F/4 -2x 580EX II Flash's -Manfrotto Tripod www.kiwiphotography.co.nz