From the Huffington Post yesterday:
Forget in-air proposals and Kanye rapping, this might be the best in-air stunt ever. On a Southwest flight from San Francisco to San Diego on March 12th, a group from SeaWorld was transporting penguins to a convention in the southern California city and decided to let them have a little free time while mid-air. An in-air tutorial on the adorable species continued over the plane's loud speaker as the penguins took over the flight.
That's the official story. But I'm convinced Southwest got rid of its flight attendants and put the little guy to work. Look closely and you'll see him tell one guy to put up his tray table...
Update 3:23 p.m. Still on the penguin beat. Here are some time-lapsed photos of a penguin aisle-walk, plus a blog post about the flight.