Don't know if this had been covered, but I tried something awhile back...
During a video (don't know the title, but it was the same ep. that had "clean my wounds" by C O C), B&B are talking about satan and talking backwords... well, I taped it, and when Beavis talks backwards, he's actually saying something... (I recorded it into my PC and reversed it) he says ..." enough is enough.... stay in school... obey your parents...stay in school and obey your parents..."