phenomena.nationalgeographic.com — There's a terrible B-movie from 2010 called Megapiranha, about giant, genetically modified piranhas that wreak havoc upon Floridian tourists. One of them leaps out of the water and bites a helicopter. It's all rather silly, but if you look on Wikipedia's entry for the film, you'll see these words at the top: "For the prehistoric creature, see Megapiranha."