Meet the Subwing — a relatively new watersport device that almost makes wakeboarding look boring. Invented by an 18-year-old in 2011, the Subwing consists of two wings connected in a rotatable swivel and is towed behind a boat with a 33- to 82-foot rope, giving the rider the feeling of "flying" underwater.
The rider can control his or her direction simply by grabbing the grips on the wings and tilting them at different angles — tilt both downward to dive and upward to resurface.
The company recommends a towing speed of 2 to 4 knots, explaining that a thrilling dive doesn't require much speed.
Check out the video and try not to want one: They cost between $490 and $895. (Learn more here.)