When riding the jet-board, do a spin (jump + R1 + left or right) then do a spin *trick* (jump + L1 + left). In the middle of the trick get off your jet-board (R2). When you get back on, if you did it right, you should be riding your jet-board sidways or even backwards! If it does not work then you probably didn't get off at the right time, so try again. To ride normal again just do a spin (jump + R1 + left/right)