I've always liked the one about the woman who was going to be stoned for adultery in John 8:1-11
7. When they kept on questioning him, he straightened up and said to them,
"Let anyone among you who is without sin be the first to throw a stone at her."
8. And once again he bent down and wrote on the ground.
9. When they heard it, they went away, one by one, beginning with the elders;
and Jesus was left alone with the woman standing before him.
10. Jesus straightened up and said to her, "Woman, where are they? Has no one
11 . She said, "No one, sir." And Jesus said, "Neither do I condemn you.
Go your way, and from now on do not sin again."
In religion class, we were also once told that, according to tradition, what Jesus was writing on the ground were the very sins of those that were ready to stone her.