>> grohl: there was spit and sweat, and that night, i just thought, "i can do this." >> cooper: grohld drums, and at 17, dropped out of high school to go on tour with a punk band. by 21, he was broke in los angeles with no way to get home. that's when he got a call about joining a seattle band called nirvana. ♪ ♪ nirvana's first album with grohl as drummer knocked michael jackson off the top of the charts and changed pop music forever. but less than three years later, nirvana's lead singer and songwriter kurt cobain killed himself after struggling with drug addiction. >> grohl: losing kurt was just earth shattering, and i was afraid of music after he died. >> cooper: you couldn't even listen to music? >> grohl: no, man. i swear, if i... if i heard a song that even touched on an emotion in me, i would turn it off. i was just so terrified. because, to me, that's what music always was. it was a direct connection to my heart. >> cooper: it took him several months, but grohl did start playing again, and went into a studio to record some of his own songs. he had no band, so he sang and play