I don't know why, but I consider this clip completely mesmerizing -- so I thought I'd share. It's the lead guitar part of "Gimme Shelter" as played by Keith Richards, from the 1969 album Let It Bleed.
If you like this, you may want to know that there are a number of other "isolated tracks" on youtube, and many of them offer a whole new perspective on a song. Another one I thought was pretty cool: the isolated keyboard and bass track for "Get Back" by the Beatles.
By the way, as I'm sure Rolling Stones fans are aware, Keith Richards recently published his autobiography, Life. The book came out in paperback just this past week. I must admit I haven't read it, but according to all reports, it covers the lead guitarist of the world's greatest band (or depending on your taste, age or point of view, the world's second or third greatest band) and his marathon journey into music, Mick, marijuana and money -- and also a few things that don't alliterate, such as sex and heroin.