On our Delta Flight 1641 from San Antonio to Atlanta on March 8th, there were two "special guests" flying in First Class, a couple of penguins (I think their names were Pete & Penny) from Sea World.
When we reached cruising altitude, the captain allowed their handler to take them for a stroll up and down the aisle so that everyone could take a look at the cute, one-foot-tall penguins and get some great photos and videos.
Here are a couple of videos (the first one starts out fuzzy but immediately clears).
This is video proof that penguins CAN fly -- and that they have absolutely no fear of flying at all! It's also refreshing to see that the captain and crew had such a wonderful sense of humor, to let them take this stroll.
It's the first time I've ever seen everyone on a plane smiling at the same time!