A hippo charges a boat on the Chobe River in Botswana. (From this video.) Hippo Facts: Hip

A hippo charges a boat on the Chobe River in Botswana. (From thisvideo.) 

Hippo Facts: 

Hippos can run up to 19 mph on land, and swim up to 5 mph. For reference, the fastest man alive has a maximum speed of ~28 mph and Olympic-level swimmers move at a maximum speed of 4.5 mph. 

Hippos kill thousands of people every year. Like almost 3000 in Africa alone. 

Hippos are very aggressive, and sometimes charge or attack for no apparent reason.

Hippos have been identified as a vulnerable species by the World Conservation Union, with an estimated population of only 125,000-150,000 in the wild.