On November 5th 2009 Major Nadal Malik Hasan shot dead 13 people and injured many more at Fort Hood, in Texas. In light of this recent tragedy, I want to know: why do people go on rampages? To examine this, I will look into a few cases (school shootings mostly) in which people, seemingly inexplicably, went on killing sprees. Why do they happen? What different explanations exist for these rampages? After I have examined past cases, paying special attention to the Columbine shootings, I will return to this recent case, of Maj. Hasan, and attempt to analyze it based on my findings.