YouTube – 1977 Vrillon of the Ashtar Galactic Command Incident:
This is a video accompanied, apparently, by authentic audio of the 1977 “Vrillon of the Ashtar Command” incident, in which a British TV signal was interrupted by a deep-voiced alien demanding that humanity get rid of its “weapons of evil” (which sounds like a George W. Bush phrase…) and get ready to evolve its way into the Age of Aquarius. Following it there are various discussions of the incident by news announcers.
Some bits of this would make awesome samples for dance tracks. Are you listening, Warlord of Marz? :)