This man was injured as the blade of the angle grinder he was using shattered at high speed, causing a deep laceration through his right cheek. Injuries resulting from the use of angle grinders are numerous. The most common sites injured are the head and face. The high speed disc of angle grinders does not respect anatomical boundaries or structures and thus the injuries produced can be disfiguring, permanently disabling or even fatal. Remember to always use protective gear and follow the instructions while working with power tools! Stay safe everyone!
This must be painful. Doesn't look like the gums or teeth are involved though.