Psychological trauma refers to any event that threatens extreme psychological or physical damage, including severe bodily harm or death. Traumatic events evoke feelings of terror, horror, and helplessness. A traumatic event can involve direct threat to the self, but people can also feel traumatized after witnessing harm or threat of harm to someone else. Traumas can include natural disasters, such as an earthquake, tsunami, or hurricane, but traumas can also stem from human behavior, as with war, assault, or rape.