HangTimer Product Website: "Whether you huck off a cliff, bomb down a bike trail, or just toss it (and yourself) in the air, the HangTimer's built in tri-axis accelerometer measures your actual hangtime. The carabiner style design fits comfortably in the palm of the hand and can be easily read when clipped to a belt loop. ... The HangTimer uses a Tri-Axis Accelerometer to detect accelerations that a person experiences when airborne. This is the same technology used by NASA in their spacecraft - so we're not kidding about the Rocket Science."
Editor's note: Gee if NASA's Strategic Communications folks were a little more hip, they'd be tracking the spinoffs that young people might actually use - instead of going on and on (year after year) about how NASA somehow invented pacemakers, modern computers, and smoke detectors.