Yes, Moo Deng, the baby pygmy hippopotamus, is cute as she tries to eat the zookeepers. Full-size hippopotami (Hippopotamus amphibius), though, are dangerous wild animals that kill between 500 and 3,000 humans per year.
It's entirely possible that a hippopotamus is stalking you right now.
What happens when a hippopotamus decides he doesn't like the bumper sticker on the back of your truck? Katherine Gilson, Steve Teichmann, and Richard Teichmann found out when a hippo charged them during an expedition through the Manyoni Private Game Reserve in South Africa. The humans escaped, but their truck took some damage.
Content warning: foul language.
-via David Thompson