There were three personalities in that body as CableHasHonor said. Good Mark, Dark Mark, and a third that never posted here. Good Mark said the third personality had a burning desire to vandalize any Port-O-Potty they came across. I always thought of the third guy as being in the middle of the three, as for the sanity totem pole.
This is CABL.com posting #150096. Tiny Link: cabl.co/mNc4