Natural user interfaces abound of late, but the trampoline-based gaming system below is one of the most fun we've seen. Designed to "make exercise less intimidating" and reduce injuries from moving around on a hard floor, the trampoline is placed on top of infrared range sensors that can detect heel and toe movement. A separate sensor in front of it detects which direction the player is turned. Using this information, the game interprets how to move the in-game point of view. Continuous left-right movement, for example, is interpreted as walking forward, and jumping is translated onto the same action on-screen.