Paracarl44, that trick with Florence Henderson is known the double thin model sawing. It wasn't a light skinned black girl that was sawn along Florence but rather it was Priscilla Lopez. They were assisting the late Doug Henning on the Night Of 100 Stars program back in 1980. How do I know this, because two reasons. One, I have the clip on VHS (and I have no way to post it) and two I have been involved with magic since my childhood and have developed into a historian/collector/consultant within the magic community. I don't know which came first for me, my interest in magic or my nylon foot fetish but they are definately connected. At the point in time of the sawing illusion where both Florence and Priscilla get their feet tickled, those are their feet and not robotic feet. It happens prior to the switch. Also, there are plenty of illusions out their where the feet sticking out in question is a real foot whether it is the main prinicipal or someone concealed in the prop.