Solo round the world yachtsman Alex Thomson recently performed a daring feat on board his high-speed yacht. Dubbed the ‘mast walk‘, Thomson climbed up the 30-meter high mast of the moving vessel, taking a moment to enjoy the view before diving into the ocean below.

Did someone ask for video?  It's irritatingly self important and over dramatic, but ignoring all that, it's still has entertainment value.
All via Twisted Sifter.