On their second Australian album T.N.T., the year after on worldwide debut High Voltage (Atlantic).
Jackyl [foundation of The Lumberjack, the only song in rock history with a chainsaw solo]
The Jackyl artwork: a hand with only the middle finger intact, pointing where you think it's pointing. All other fingers were lost in the solo. Novelty landing them an invitation for the Woodstock '94 line-up.