One of the comments on the You Tube site for this says that a friend put this music on the writer's alarm. When it went off he thought the day of judgement had arrived. As it's Dies Irae or Day of Wrath, it's not surprising. http://www.youtube.com/watch?v=pW1Uc-grcMs&feature=related
If you know what it's like to get goose bumps listening to music then this should do it for you. It only last a very short 2 minutes. It's from Verdi's Requem. George Solti.