If I remember correctly, I took it with one of my d700 bodies + a 105/2.8 VR macro + one on-camera SB800 flash (pointed at the ceiling, but with its bounce card up) + an SB900 (@ -1.5 stops) fired wirelessly, and also bounced off the ceiling, but located a bit in back of the cat to give a bit of rim lighting + fill in the distant background.
The first time he did this, we completely cracked up. Then it got to be a fairly regular habit. In spite of this, it was nearly impossible to get a good shot of him in this position because whenever the camera and flashes were set up and ready to go, he would head for the hills.
What you don't see are the tiny pieces of hard cat food scattered over the floor that we used to try to lure him back into this pose.
I didn't have to do much processing of the original file, but thank God for the content aware fill to tidy up the mess on the floor. ;-)