A recent recording session with Lou Reed left Metallica guitarist Kirk Hammett and frontman James Hetfield a blubbering mess. The group were working on a song called 'Junior Dad' for their upcoming collaborative album called 'Lulu.' The lyric, "Say hello to junior dad / The greatest disappointment / Age withered and changed him," stopped the show.

"(Reed) managed to take out both guitar players in Metallica in one fell swoop with his amazing poetic lyrics," Hammett tells Britain's Mojo magazine. Hetfield's father abandoned him when he was 13. Hammett was struggling with the recent loss of his father.

"I had just lost my father literally three or four weeks previous," he said. "I had to run out of the control room, and I found myself standing in the kitchen, sobbing away. James came into the kitchen in the same condition. He was sobbing too. It was insane."

Somehow the world seems a more peaceful place knowing that two of rock 'n' roll's heaviest hitters aren't afraid to share a good cry from time to time. One figures they hugged it out and got back to work quickly. 'Lulu' -- in stores Nov. 1 -- is an album based on music Reed had originally written for a theatrical production. He changed course after playing with Metallica at the 2009 Rock and Roll Hall of Fame concert in New York City.