To make the body produce adrenaline, people usually juggle soldering irons or trap wild animals underneath wet newspaper. Today's Groupon gives you a more comfortable way to excite your cellular infrastructure: for $90, you get a two-hour kite-surfing lesson (a $185 value) from Fort Lauderdale Kite Surfing School on Oakland Park Boulevard.

Kite surfing combines the aeronautical elements of kite flying with the exciting thrill ride of board sports such as wakeboarding and windsurfing. Just as wind-filled sails propel oil tankers across the Atlantic in mere hours, a large, wind-snaring kite tethered to a harness and control bar provides kite surfers with sufficient propulsion to skim across the water, soaring as high into the air as 20 to 40 feet. Fort Lauderdale Kite Surfing School helps students trick the wind into doing the work of their legs and vestigial wings with lessons designed to get newbies familiar with the literal and metaphorical ropes of the sport. In a 120-minute action-packed knowledge bonanza, patient instructors teach skills such as how to control a kite, how to get it airborne once it's fallen in the water, and how to coax it into towing you to shore like an obedient porpoise.

Each Fort Lauderdale Kite Surfing School lesson features no more than three students per instructor, ensuring plenty of personal interaction for addressing specific questions and creating secret handshakes. The school is certified by the Professional Air Sports Association and overseen by long-time kite-surfing instructor and part-time squid whisperer Graham Goodwin. In addition to its recreational appeal, kite surfing provides an effective full-body workout, turning gravity-bound, gelatinous physiques into airborne statues of bulletproof platinum.

Must be 12 or older and must sign a waiver.