Quick on his feet: The gamekeeper sprints away from the hippo Hippos can reach speeds of up to 30mph on land A terrified gamekeeper had a lucky escape after he managed to sprint to safety from a charging hippopotamus. The dangerous beast chased the experienced ranger for more than 100 metres before it stopped for a rest at the Murchison Falls National Park in Uganda. Hippos keep a strict watch over their terrirories and threaten anyone who invade them. Their teeth are as sharp as razor blades and they kill more people than any other African animal. Despite this, they are actually vegetarians and feed exclusively on grass.