The first parachute was invented when Jack, tumbling haplessly from his titanium beanstalk, used a purloined pair of giant underpants to steady his fall. Glide to earth safely with today's deal: for $159, you get a tandem skydive (a $225 value) at West Tennessee Skydiving. There is a weight limit of 220 pounds, and reservations are required. You must be at least 18 years old (16-year-olds can jump with one parent present and permission from other parent).

Located on a private airfield about 45 miles east of Memphis, West Tennessee Skydiving drops parachute-wielding thrillseekers into freefall with the assistance of a USPA-licensed instructor. For those who don't feel comfortable skydiving solo, tandem skydiving allows rookie divers to experience parachuting while harnessed to a professional instructor. Aspiring air-plungers start by learning skydiving basics with a 20-minute video briefing and short lesson from their tandem instructor. After climbing up to 14,500 feet in one of West Tennessee Skydiving's planes, you'll securely hook suits with an instructor and leap out for a 50–60 second freefall, reaching speeds of 120 mph. Once your parachute opens, you'll serenely glide above the globe for five minutes, then steer your canopy in for a cushy landing with the help of your newly minted Siamese un-twin. Afterwards, divers receive a certificate verifying their obedience of the laws of gravity and have the chance to discuss the experience with their figuratively down-to-earth instructor. You can also use this Groupon to get 10% off a DVD of your jump made by a professional freefall photographer ($100).

West Tennessee Skydiving's facilities feature an 80-foot gravel target and a mock-up airplane, used to practice properly jumping out of the plane and landing gracefully with a well-executed triple-axel.

Training and jump may take two to four hours to complete, so you must plan accordingly.