You need to be able to do 5-0s, 50-50 stalls, and drop in the mini ramp you are trying this on.

Drop in and ride up just like you would for a 50-50 stall. When you go to get the back truck on just do a normal kickturn and put pressure on the tail to keep the nose up. Don't let the front truck touch down. Stall for as long as you like unless you grind and are running out of room. Comming out of this is just like a 50-50 stall except you have problems with doing tail drags and slipping out. Just think of it as comming out of a 50-50 stall and a 5-0 on a box or something. This trick is almost as easy as a 50-50 stall.