This Robot Snake Means You No Harm, Really

If you've never had a robot snake constrict around your leg, let me tell you, it's a weird feeling. As it curls its way up your ankle, then shin, then finally wraps around your knee, it gets tighter and tighter. Fortunately, unlike a real snake, it doesn't have teeth. Unfortunately, also unlike a real snake, it's made of metal joints that pinch harder and harder until you say, "OK, that's enough," and the young man at the controls hits a button and calls off the machine. The snake slithers, a robot insect crawls about, and a wheeled biped speeds down the hallway--until you try to give it a push and it crashes into a wall.