Until the personal watercraft was invented, mankind's only hope for summer fun involved hitting candied hams with tree branches. Today's Groupon celebrates watery invention: for $60, you get a one-hour jet-ski rental from MDR Jet Ski in Marina Del Rey on Bora Bora Way or in Redondo Beach on North Harbor Drive (a $120 value).

MDR gears up hydro-commuters with a fleet of 2008 and 2009 Sea-Doos complete with four-stroke engines, security systems, full gauges, and reverse capabilities to partake in the prime wave-running season of May through October. Each rental outfits up to three riders at a time and commences with a full orientation, riding instructions, videos of celebrity dogs ski-jumping, and safety procedures. Once completed, MDR suits up marine travelers in life jackets before freeing them to streak donuts and pop invisible wheelies upon the vast aquatic parking lot.

Located just a stone's throw or beef's catapult away from LAX, MDR ensures both convenient and comprehensive jet ski service to all riders. Each life-jacketed jet-ski pilot is additionally entitled to sip complimentary beverages.

While MDR obtains credit card information upon arrival, no deposit is required.