David Opderbeck, who blogs at Through A Glass Darkly (which by the way, is a superb Bergman movie as well), brought up an interesting passage to discuss in a conversation: Exodus 4.24-26.

At a lodging place on the way the LORD met him and sought to put him to death. Then Zipporah took a flint and cut off her son’s foreskin and touched Moses’ feet with it and said, "Surely you are a bridegroom of blood to me!" So he let him alone. It was then that she said, "A bridegroom of blood," because of the circumcision.

This passage is just plain weird.  God tells Moses to go to Pharaoh and preach the exodus of God's people to the wilderness, then decides in the next few days that he is going to come down to earth and bust Moses' head open.  Luckily Moses' wife was quick-thinking.

Any insight on this passage?