Nature can be a very harsh mistress. In a battle of survival of the fittest, and where only the strong survive, death can come unexpectedly from anywhere. This video proves that. Hippos are actually very aggressive and very dangerous animals. You do not want to get caught in hippo territory. Unfortunately for this impala, that's exactly what happened. While running for its life from a hungry lion, the impala finds itself stuck in a mud pit. Unfortunately for the impala, that mud pit happens to belong to a hippo.