A man on Long Island last night had the misfortune of having not one, but two fancy cars stolen from him, all in a matter of hours. A man out to dinner at a Manhasset restaurant in Nassau County had dropped the keys off to his Mercedes when someone got a hold of them and took off with the vehicle. But things only got worse for him from there when the thieves discovered a second set of keys to the man's Porsche, parked in his driveway at home. Police believe that the criminals used a GPS system inside the Mercedes to locate where the man lived and then used the keys to drive away with the second car as well. When the victim learned that the Mercedes was missing, he called home and discovered that the Porsche had also been stolen.