Music Track - Clapton

Eric Clapton is arguably one of the greatest Rock and Roll guitarists of the century.  His Layla however has always rather confused me as it is really two separate songs in the eight minute performance.  I've often wondered why he didn't make two recordings.  This is from a 1999 Madison Square concert.  A true classic. http://www.youtube.com/watch?v=fX5USg8_1gA