Sure, you think you have a better, stronger, and faster golf swing than your neighbor, but you just can't prove it. Now you can with the Golf: Blast Series. These little sensors only weigh 2 grams, but they collect data on anything they're embedded into, like golf clubs, baseball bats, and tennis rackets. Blast is currently partnering with a number of sports equipment manufacturers so you can get some real numbers and put an end to all your squabbles on the course. (Due out later this year, about $100).