Spotted Hyenas
These carnivores are likely to have the last laugh in an unexpected encounter with a person. They have a bite with a force of 1,000 pounds per square inch and, when they attack, they go for the face, neck, and spine, inflicting damage to soft tissue and internal organs as they go.
Though they generally stay away from humans, they do occasionally make their way into urban areas and cause plenty of problems for those who encounter them.