"<a href=""https://www.youtube.com/watch?v=8Gk7EvCQGoo&amp;t=1m53s"">1:53</a> The optical setup uses the same principle the controllers on the Nintendo Wii worked with the sensor bar on top of the TV. Who knew the game Trauma Center was an actual simulator? 😆",(reply>), Exactly what I was thinking. It's just a big Wii sensor bar telling you where you are in someone's head.,(reply>), Same technology, just differ in tolerance.