Passover, or Pesach as it is called in Hebrew, is the 8 day festival where the Jews celebrate their liberation from Egypt more than a thousand years ago. One of the most important features of this freedom festival is that the Jews cannot eat anything that is leavened. They eat unleavened bread.

They must also make sure that no bread crumbs exist in or around the house: the cupboards, the drawers, the kitchen, behind the bed, under the refrigerator and anywhere else where crumbs might have fallen through. To ensure that the house is clean of leavened food materials, the Jews have to clean the entire house from top to bottom as thoroughly as possible. And they do. During the week before Passover, house cleaning is what goes on in most Jewish houses. To answer this demand and to ease the tension, here is a joke on this subject called Impossible Timing, which highlights this cleaning tension.