Prevent TBI

Prevent TBI (Traumatic Brain Injury) - put a helmet on! And you fill the helmet with sensors prior you put it on you can which TBIs it prevented, when, and how. (If it did not prevent TBI, be sure it was the last recorded)

The US Army model (let's call it 'Pro Edition') can record 527 events ranging from being dropped on the ground to being blasted by a bomb. The sensor weighs 6 ounces, runs on a battery that can last six months and fits on the back of the helmet (see the video here).

The football model ('Home Edition'?) is equipped with sensors that measure the magnitude, location, and direction of blows to a player's head. The single number that I found about it is the price - US$999. Put it on if you value your head, or do not play football.