Unsuitable for the not-so-flexible kind, this position may look a bit awkward. If you're limber enough it can be very exciting.
The man lays facing up and she climbs on top and leans backwards, thus guiding his penis in, bends her knees and slowly lies on her back so that his penis stays in. In order to achieve a desirable thrust pattern she jacks her hips up to relax it on top of his belly thereafter. He in turn can easily reach her clitoris and breasts. She couldn't be busier than that; in so far as getting exhausted that turns it so exciting. According to the Kama Sutra some of these positions are based on the Hatha Yoga, hence their difficulties to performing.