A surfing rola bola balance is where you balance on your rola bola so it looks like you are surfing. Stand so your feet are parallel with the board (your shoulders should be perpendicular to the board). Then balance so neither of the ends of the board is touching the ground. I find this trick easier if you keep one foot almost right above the pipe that you are balancing on. It makes it a lot easier, and sometimes helps the board from rolling off of the pipe when standing like this (and it doesn't look like I'm standing like this in the picture).

Video- Surfing Balance