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
Plus, duo ends fiery video with an impromptu performance
From the latest installment of the duo's web series/forthcoming album 'Post-Apocalypto'
Sharks, bombs and two-headed dogs
Jack Black shows you how to paint Kyle Gass: "Let's explore his body together"
"It's time for us to butterfly again"