This is an old school trick and it's really easy to do.
Go at a pretty slow speed then jump of the board so your parallel with it. Grab an Indy but don't actually hold it just keep your fingers under your board. Then jump up and do a B/S 180 Body Varial. But when you jump spin the board so it does a finger flip. This is really easy to learn and it doesn't look that good but the faster you do it the better it looks. All it is, is a finger flip while the board is on the ground and in front of you the when you jump to land on the board do a B/S 180. Simple as that!