I revisited the area of the sighting in the SWIFMUD area where I caught a Skunk Ape on film. I thought the camera setting was on video, but it was on photo. Anyway, the image was clear and good. A critic told me what I had captured was a tree stump. He insisted that I go back out there and see if at stump was there.
I went back out there (stepping over the viper snakes) and there was no tree stump sticking out of the ground. There was nothing out there that could have caused an optical illusion. My conclusion was that I had photographed an upright bi-pedal animal.