The Casino Man is a man Casino.Bart once wandered off into a peat bog where he died and became a bog body. The Casino manager showed Bart the face of God.
The symbol for medicine is supposed to be the rod of asclepius but everyone uses the caduceus instead because it looks similar and people got it confused I guess but the caduceus actually represents "trade, eloquence, negotiation, alchemy, wisdom, and controversially, thievery, lying, and the passage into the underworld." (thanks wikipedia). I just think that's interesting and kinda fucked up like the symbol that supposedly represents medicine actually represents lying among other things