Cast the first stone...
 

A harlot is about to be stoned to death by a crowd, when Jesus steps forward.

"Let he who is without sin, cast the first stone," he said.

The crowd is still for a few moments, then suddenly a rock comes flying out and hits the harlot on the head, killing her.

Jesus turns round and glares.

"Mother," he said, "Sometimes you really p*ss me off..."

I told my husband this joke (amazingly it actually casually came up in context, lol). Glad I had it on hand, very amusing!