Patrick:
The green site is on a natural saddle in the ground, and the green itself is shaped much like a saddle -- it's high at the left front and highest at right rear, low at the right front and lowest at left rear.
The right-hand hole locations are relatively straightforward, although the pronounced slope from back to front is broken up by a couple of small ridges at the edge of the green, instead of just tiers. These make for VERY interesting recovery shots from the right.
The front left location is fairly hard to get to ... you can either play pin high right, or if you drive it right, you may be able to aim to the left front edge and bounce one in close.
The back left location is the crazy one. If you go straight at it, a lot of shots will go straight on through into a back left bunker, and others will stop short of going down to the back. The idea for the green came while I was trying to figure out how to prevent a right-handed player from having an unplayable lie if he wound up in the edge of that back bunker, where you couldn't take a stance to play out toward the back left pin. It dawned on me that if we flared up the very back of the green, you could play a shot out that way and then have it gravity-feed back down the slope to the left rear pin. As it turns out, that's also the way to putt or chip from high-right to low-back-left ... play up to the back of the green and watch the ball make a U-turn and feed down to the hole on a gentler fall line.
I think that Bill Coore tried to do something similar with part of the seventh green at Friars Head that Tom Paul was talking about earlier; if so, that's the only green I know of that would be anything like it.