A flight was on its way to Los Angeles when one of its pilots came and said "I'm sorry to inform you that one of the flight's engines has stopped functioning.
"This is no cause for concern because we have three more engines. However, the flight will just be delayed by an hour".
Shortly afterwards, the pilot reappears and says "I'm terribly sorry, but a second engine on this plane has stopped functioning. There is no danger; this plane can fly quite normally on two engines. However, the flight will now be delayed for two hours."
After about twenty minutes, the pilot comes and says "I'm afraid that the third engine has stopped functioning as well, but we have one more engine functioning well. The flight will just be delayed for a couple of hours more."
A blonde passenger at the back of the flight turns to another passenger and says angrily "I hope that last engine doesn't stop functioning! We'll be stuck here all day!"