I did not read the original thread, so maybe this was on it. Older than dirt, it is.

The king grew weary of the jester's constant terrible puns. The king locked him into a small closet and told him he would not release him unless the jester could come up with a good pun concerning the his present situation.

The jester shouted from behing the locked door, "Oh, pun the door!"

Sorry!

khandu