Even the king of the jungle can have a bad day when trying to cross a river guarded by an aggressive hippo. Three lions found out the hard way that this river crossing was a giant hippo’s territory.

The hippopotamus, commonly called "hippo," is the third-largest living land animal. Male hippos can weigh up to 9,920 pounds while females weigh around 3,000 pounds, according to PBS." The animal's ...