In this concept the bar rotates. Instead of freely rotating on bearings, the bar is powered by a small electric motor. Dificulty can be adjusted by increasing speed and changing or alternating spin direction.

Here we create the illusion of a burning bar with the thermal grill illusion. Interior channels carry alternating hot and cold water. The contrast between the two creates a burning sensation despite being safe to the touch. Curious how it works? Check it out here (external link).

This bar is comprised of two outer sheaths. A a solid shaft supports the two hollow sections. A few seconds after grasping the bar, a linear actuator retracts the interior beam, which allows half the bar to freely rotate. Gravity will overcome even the strongest grip.