Vigil mass joke

Our priest opened his homily with a joke at the vigil mass for the Immaculate Conception last night. I think it's a pretty good one so, here it is . . .

So, you all know the story of when the Pharisees brought the woman who committed adultery to Jesus. They said to him, "Teacher, this woman was caught in the very act of committing adultery. Now in the law, Moses commanded us to stone such women. So, what do you say?"

Christ replied by saying, "Let the one among you who is without sin be the first to throw a stone at her."

Suddenly a stone comes flying out from the crowd. Jesus turns and looks and says, "Holy Mother of God! I'm trying to make a point here!"