Pop quiz, hotshot. The most dangerous animal in Africa is:

a) Lion

b) Crocodile

c) Elephant

d) Rhino

e) Hippo

Of course, it's the hippo. According to About Travel:

The hippo is responsible for more human fatalities in Africa than any other large animal. Male hippos actively defend their territories which run along the banks of rivers and lakes. Females have also been known to get extremely aggressive if they sense anyone coming in between their babies, who stay in the water while she feeds on the shore. Hippos can run at speeds of over 20 miles an hour and they have enormous jaws which host up to 20 inch canines.

 

My favorite reaction to this video comes from Jonah Goldberg, who wondered if perhaps the cargo of marbles is what attracted the hippo.