Check out CNN, or any other news site, and read about the family, on a
chartered a sailboat off Australia, that encountered a 30-ft humpback
looking for a back scratch...They allege that the whale attempted to scrape
barnacles from its body, using the toerail of the boat, and it accidentally
injured itself on the rigging and even dropped the mast. Pretty incredible
stuff, but a very short story.

http://www.cnn.com/2003/WORLD/europe...eut/index.html