This was Warren Zevon's last single. He wrote it after he realized he was dying. It was released on his last album, The Wind, two weeks before he passed away from mesothelioma, a form of lung cancer.
Think about mortality as you listen to it.
Despite being dead, Warren Zevon managed to appear on the Grammys in 2004. This is a very special tribute to the man, and you should see it. These artists - most of them legends in their own right - aren't singing a duet. They are singing backing vocals.