I think Tom Green does this on his show.
Pickup your board so your holding the edge closest to your body and it's parallel to your shoulders. Flip the board around so it does a hard flip thing:You should catch it on the outside edge so it should do a 180 kickflip (varial flip thing) then twist your hand so it on the far end (it should spin a 180 making a 360 flip) and jump up and put it under your feet and land looking like Tom Green.
Good Luck!
By: Tom-E