Check out this video of a Humpback Whale rescue. 

The whale has been entangled in a local fishing net, and is not far from death.  Luckily Michael Fishbach, a founder of the Great Whale Conservatory (and Speedo enthusiast, apparently), jumps into action.  After a lot of time and effort, the whale is freed from the net.  She celebrates with an hour of breaching, tail slaps, and fin slaps.