musical interlude

What is it about certain fragments of music that make the hairs stand up on the back of your neck. In my case such as the opening chords of Badge by Cream, or the opening of Kid A by Radiohead and that part of Karma Police - 'for a minute there i lost myself' as it builds to a crescendo. Others defy being repeated countless times such as 'love will tear us apart' by Joy Division. You never seem to tire of listening to them time and time again, often trying to detect the lyrics.