Rock and Roll Joke Kurt Cobain dies and when he opens his eyes, he's in a big practice hall. Looking around he sees Cliff Burton tuning up, Jimi Hendrix and John Lennon warming up on microphones and adjusting their guitar straps to fit, and Jerry Garcia messing with his pedal steel guitar. Kurt ambles over to Jerry and says, ""So, this is what heaven is like, huh?"" Jerry looks up and says, ""Heaven?"" Karen Carpenter walks in, sits down behind the drum kit and says, ""OK everybody -- 'Rainy Day…