As the name implies, it's the Sybian, but in reverse! The partner on the bottom is straddled by their lover (who is facing away) as they lay back on an ottoman or a positional aid. Ideally, the receiver can comfortably maneuver themselves by putting their weight on their feet, or simply sit back and move their hips as they please. The receiver’s hands can be placed in front or on their thighs to help maintain balance.
As an alternative, the receiver can vary the depth and scope of penetration by leaning back and placing their hands behind; it is easier in this variation for the lower partner to do some thrusting. If Reverse Sybian is too deep of a penetrative position, the lover on top is able to hover over her partner, thus making it an invigorating quadriceps exercise as well!