Parents often blame underage drug use on that damn rock music, but for young Dave Mustaine, hard rock actually sobered him up...for a day at least. That's because Mustaine bought his very first album by bartering with a bag of...something.

"I traded drugs for it," the Megadeth frontman recently told Rolling Stone. "I won't tell you exactly what it was I traded. But I did get an AC/DC 'Let There Be Rock' record for it. What I got came in shrink wrap, and what they got came in a Ziploc."

And that's all he'd say on the subject. But he did open up more about his first job and how a Lynyrd Skynyrd riff turned into Metallica's 'Four Horsemen.' Find out more in the clip below.