Humphrey The Hippo
The last person you’d expect to have chosen to keep a hippopotamus as a pet is an experienced military officer. However, it’s not hard to see why that would be a bad idea after all. Despite this, one South African army major had compassion for a flood-stricken hippo and thus took on the responsibility of caring for it when it was young.
Humphrey, as the hippo was named, went on to harm not just inanimate objects. The hippo eventually turned on its guardian, the major, and attacked him. As expected, the hippo caused harm to its owner.