This one, of the Sacramento State Jazz Singers performing an A capella version of "All Along The Watchtower" as it was arranged in the show by Bear McCreary.
It's frakkin' crazy how good this is, from the eerie background arias, to the fantastic beatboxing that's going on, the SSJS kids kill it! It gets pretty wild too, with the Chris O'Donnell look-a-like lead rocking out and a show stopping finale. Thanks to fellow nerds over at toplessrobot for bringing this to my, and the world's, attention. So say we all!