On land, hippos can run at speeds of 18-31 miles per hour, though they can only sustain this speed over short distances; in water, hippos can move at about 5 miles per hour. Hippos can easily outrun and are known to be quite aggressive toward humans.
While they have a hefty appearance and and might not seem very threatening, hippos are strong and unpredictable and, thanks to this, the fact that they can outrun humans, their size and the fact that they have razor-sharp teeth, they are considered one of the most dangerous animals in Africa. Hippos are one of the largest land animals at an average of 3,300 pounds (1,500 kilograms), coming in just behind elephants and certain species of rhinos.
The hippopotamus is one of the most aggressive and unpredictable creatures in the world. Even though they are herbivores and do not typically attack humans, they charge if they are feeling scared or are trying to protect their young. Never stand between a hippo and water. Tips for avoiding a running hippopotamus are to climb a tree or run between rocks to slow them down.