You can find a lot of weird stuff on YouTube, such as this video of a water-skiing elephant. Watching it, I feel kind of sorry for the poor elephant made to do this.
The story behind the video is that it was a publicity stunt from 1959 dreamed up by New York PR man Max Rosey in order to promote an amusement park. Rosey was also the man who came up with the idea for an annual hot dog eating contest in Coney Island to promote Nathan's hot dogs.
I found this video (and the explanation about it) on a blog called Liquid Soap, which is about publicity stunts of yesteryear. The blog is written by Mark Borkowski, who's also the head of the UK's Borkowski PR agency.