Activities, Things To Do, Gifts & Gift Ideas Adrenaline USA is America's best known and most trusted supplier of the most AWESOME GIFT IDEAS and GIFT CERTIFICATES in the country. Whether you are looking for things to do, exciting activities or straight out adventures Adrenaline USA has over 1,000 experiences to choose from including; Skydiving, Hot Air Ballooning, Helicopter Rides, Nascar Drives, Jet Boat Rides, Scenic Flights, Scenic Cruises, Go Karts and much much more. Treat yourself or buy a gift certificate for someone special. If you're not quite sure what they'll enjoy then work out how much you want to spend and let them choose with a Flexi Gift Certificate. An adventure near you awaits.