What is the background music used in this video? (the stalking mangina preview) !

Question: What is the background music used in this video?
http://youtube.com/watch?v=lIokBmqq6A0&f...

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Answers: What is the background music used in this video?
http://youtube.com/watch?v=lIokBmqq6A0&f...

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It's from Tubular Bells by MIke Oldfield and was used in at least one horror movie The Exorcist).

Enjoy it here with psychedlic graphics
http://www.youtube.com/watch?v=pEnYJzU9q...

Or here it is in a 1973 video
http://www.youtube.com/watch?v=P4eZJh3FF...

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