The Prodigal Son. A boy leaves home certain he knows everything, and returns home certain he doesn't. The father waits, the older brother fumes, and grace shows up uninvited.

John the Baptist sees Jesus and announces, "Look, the Lamb of God." His disciples immediately leave him to follow Jesus. This is either terrible marketing or extraordinary faith.

John baptizes people in the river while wearing camel hair and eating locusts. Then Jesus shows up and asks to be baptized, which makes no theological sense whatsoever.