Flight attendants are used to flying in airplanes, but not many have flown outside of them.
United Airlines flight attendant Sabrina Swenson did just that to celebrate her 50th birthday, according to a blog post she wrote for United's website.
But it's not her first time. That was eight years ago, when she was strapped into a standing position on top of a Boeing Stearman biplane before taking off.
"I knew I had to do it, and what better occasion than to celebrate my 50th birthday?" she wrote.
After training at the Mason Wing Walking Academy in Sequim (two hours outside of Seattle), Swenson and her pilot took off.
Watch....can you imagine ever doing this? :)