It is pretty much the opposite of the cork. Best to try to learn it on a trampoline or diving board first if you can. Here's how I think about it when I'm throwing bio.
1)I approach the lip with a mellow left carve. As I hit the lip, I transfer a bit of weight to my outer edge so I drift right.
2)While I pop, I think of dropping my right shoulder just a bit (not too much, it will make you do more of a rodeo), drifting a bit right, and setting my spin for a fast 7. Also, I try to think of doing a 180, and then looking down over my left shoulder (as you would for a cork, only later)
3)From there, it is all about tuck and grab. The tighter you stay, the quicker you'll rotate and you should come back on axis.
The first few will feel weird but keep at it.