Adapt Laser Systems claims it has the most powerful handheld laser system on the planet. But it may have met its match. The Chemsol Randogrip is an extremely durable nonslip supercoating trusted by the U.S. Navy. Next up, two competitors battle it out in a game of tug-of-war not fit for the schoolyard. The JetCat, a mini version of a commercial jet engine, is challenged by the Jetovator, a watercraft that can propel its rider straight into the air.