I had just parked my Jeep and shut it off when it started rocking side to side... Now the engine has a habit of dieseling on sometimes, so I think to myself maybe I broke a motor mount or something. Then I realized it wasn't running, so I thought, "Huh. Gust of wind, I guess."
Turns out, it was Armageddon. On Facebook, anyway.
Although to be fair, the one earthquake I felt when I lived out in CA was equally as impressive.