I thought that this weird doctrine about the Mark of Cain had long since been put to bed. Apparently there are still some people who say that the "Mark" is that God turned Cain black. Seriously. This is still being taught. Pastor Gary, however, put that to rest in 3 seconds flat.
Also, we talked about Repentance. Pastor Gary seems to have found something interesting comparing how the word "repent" is used either by St. Paul or Jesus. Fascinating stuff.