This comic is based on a long-standing observation of mine... that Dave Mustaine sometimes sounds like Oscar The Grouch when he's singing in Megadeth. (And if you don't believe me, check this out.)
TRANSCRIPTION COURTESY OF JOSEPH HOUK -  (BG, at a mega-mart store) "Well, it was inevitable." (CW) "Yeah, I had a feeling this was where the 'Guitar Hero' phenomenon was headed... [Banner in the background: Miley Cyrus – Dakota Fanning: Girls With Slingshots (Now Available On Blu-Ray And iShow)] ...Hardcore Metal being marketed to little kids!" [Widescreen LCD with "MEGAGROUCH", and Oscar on lead guitar!] (Oscar) "PEACE SELLS... BUT WHO'S BUYIN'!!!"