"The Children Will Rise Up" was co-written with Morello's son Roman
Performed as part of "COVID Is No Joke," a virtual comedy fest for COVID aid with Americares
Jack Black introduced thrashers, riffed on "One" with Papa Het
Comedy-rock duo also take on shower sex, line dancing, Tenacious DJ
Fifteen years later, now-professional drummer is all grown up and playing in own rock band
Proceeds went to late singer's Stand Up and Shout Cancer Fund
Iron Maiden, Dio, Amon Amarth and others in the running
Jack Black shows you how to paint Kyle Gass: "Let's explore his body together"
"It's time for us to butterfly again"