18-foot great white shark off coast of North Carolina (!).  Filmed with iPhone 4s.  Completely gives me the willies.

Link:  http://www.nytimes.com/2011/11/30/world/middleeast/doha-qatar-glitters-like-a-world-city-but-few-feel-at-home.html?_r=1&emc=eta1&pagewanted=all