ex-DREAM THEATER. Dream Theater fans received a massive surprise one night in Barcelona when the band tore through the Master of Puppets album from start to finish. Lars Ulrich would later tell Mike Portnoy it helped inspire Metallica to do the same thing. The legendary rock drummer (who played in Dream Theater for 25 years and has recorded and/or performed with Avenged Sevenfold, Twisted Sister, and his own prog-rock supergroup, Sons of Apollo) talks about discovering Kill 'Em All, seeing Metallica in 1985, getting to know Lars, and so much more.