Henry Rollins

He goes to a show and climbs on stage at some point and sings with the band, the next day he leaves his job at an ice-cream shop to go on tour with said band. The band is Black Flag, he is Henry Rollins. Since then he has become a legend. A vocalist (more like a shoutcalist) for blackflag for several years, then he went on to form his own band and publishing company 2-13-61 (his b-day). He also does spoken word shows. Now he has his own show on cable tv, as a movie critic.