Inject some space-age fantasy into your Caribbean vacation with a once-in-a-lifetime experience from Jetpack Cayman -- courtesy of a deal exclusive to Travelzoo subscribers.

Harness into a water-propelled backpack and skyrocket up and out of the water for $199 per person. This 20-minute adventure -- which you'll brag about when you get home -- is $50 off regular prices.

Set along Seven Mile Beach in Grand Cayman, the jetpack adventure runs all day from 8 a.m. until sunset. Before the flight, a certified instructor will provide a comprehensive tutorial and do safety checks. The instructor and a flight navigator will be on watercraft alongside you during the flight.

This exclusive online discount is available for pre-booked "flights" through July.