Nick & Vanessa may have just flown the friendly skies, but on land leaving JFK Mr. Lachey was feeling decidedly un-friendly. The two were en route to their awaiting SUV when a pesky paparazzi said something particularly infuriating to Nick. After first helping Vanessa into the car, Lachey grabbed the photographer by the arm (video here)  and, according to the paparazzi whispered, "I'm going to f**king kill you if I ever see you again!" Hmmm, I wonder what the photographer said to get such a rise out of Nick? He's not usually one to let them get under his skin.