Springsteen's "Ghost of Tom Joad". Original version was acoustic, on the album of the same name (circa '95). Later version was amped up more, and added Tom Morello of "Rage Against the Machine", and takes on a much angrier tone, reminiscent of "Darkness on the Edge of Town". The dueling guitars between Bruce and Tom in the middle alone is worth viewing, but then Tom does a two minute plus rift starting around 6:28 until the end, which is outstanding.
Interesting side note: Steve Van Zandt and Patti appear alongside Tom during his spotlight moment, playing acoustic guitars (Steve may have had a mandolin), as if you can even hear them.