What is when the man comes around?

"When the Man Comes Around" is a song by Johnny Cash. It was released as the title track from his album "American IV: The Man Comes Around" in 2002, and also appeared on his posthumous album "American V: A Hundred Highways" in 2006. The song is about the end of the world and the arrival of the Four Horsemen of the Apocalypse, as described in the Bible's Book of Revelation. The song became popular after being used in the opening credits of the film "Dawn of the Dead" (2004). The song features Cash's trademark baritone voice, and is characterized by a sparse acoustic arrangement with a haunting melody. It is regarded as one of Cash's best later tracks, and has been covered by many artists.