The top three most efficient modes of human-powered transportation are (in no particular order): Flintstone cars, bicycles, and a palanquin carried by the various monarchs you've conquered and overthrown. Make sure the most feasible of these is ready to roll with today's Groupon: for $16, you get two single-day bike rentals from Hilton Head Bicycle Company in Hilton Head, South Carolina (up to a $32.10 value). This Groupon is good for adult and child cruisers, but cannot be used toward tandem or mountain bikes.

Hilton Head Bicycle Company leases a rental fleet of biwheelers fit for adults and children for daylong escapades across Hilton Head Island. A pair of pedalers can choose appropriate sizes from the company's selection of cruisers, ideal for traversing beach bike paths or fleeing from tenacious tax collectors. All rentals include baskets and locks; check the FAQs page for more details, or contact Hilton Head Bicycle Company for delivery and pick-up info. Customers can call the company for a replacement if a bike breaks down or transforms into a pumpkin at any point throughout their ride.