Gravity loses its grip near the shores of Sandusky, Ohio. Here, certified instructors strap customers into a water jetpack's five-point quick-release harness, which uses twin streams of high-pressured water to elevate adventurers up to 30 feet in the air. Attached to a nearby boat, the system's 200-horsepower engine pumps water through a 30-foot hose and churns through a staggering 1,000 gallons per minute. This allows jetpack pilots to run along the water, speed through smooth turns, and dive below the surface. Back on the shore, instructors can remotely control the jetpack's throttle, which allows beginner pilots to stay focused on games of extreme Marco Polo.