Was the critter reading and/or smoking wile taking the deuce? If so what was he reading, and what brand was he smoking? These details would be a great help. But I'm going to have to guess skunk.
A horned toad riding on the back of a feral cat w/o a saddle, cuz he's tough. BTW they both dumped a load simultaneously. A very rare? event, caught on your camera. Priceless.