Billy Joel reveals that he twice attempted suicide in his new HBO documentary 'And So It Goes,' and that one of the attempts left him in a coma.

The first part of the documentary told the story of the Joel being in the band Attila with his best friend Jon Small, whom Joel eventually went to live with in a home occupied by Small, his wife Elizabeth Weber and their son. Weber reportedly said in the film that there was a “slow burn” between her and Joel.

And So It Goes, premiered at the Tribeca Festival in New York on Wednesday and it featured a section about one of the most difficult periods in the 76-year-old singer's life. According to People, the film co-directed by Susan Lacy and Jessica Levin delves into a dark incident early in Joel's career when he attempted suicide two times after having an affair with a former bandmate's wife.