armstrong unleashed a cascade of angry "f" bombs during a live concert over the weekend in vegas, and, yeah, it was all caught on tape. >> you got to be kidding me. >> reporter: it started suddenly. >> give me a break. >> reporter: green day front man billie joe armstrong goes off out of nowhere diving into a rage-filled tirade. >> i'm not [ bleep ] justin bieber. >> reporter: smashing the guitar before storming offstage. >> we'll be back. >> reporter: shocking the thousands of fans who just moments earlier were rocking out with one of the biggest bands in the world. ♪ am i just an -- >> reporter: so how did it go from this to this? >> i got one minute, one minute left. oh, now i got nothing left. >> reporter: it turns out billie joe's freak-out was a matter of time. you can see a monitor. cue the band. they've got one minute left. that's what set him off. >> look at that sign right there.