A 747 was halfway across the Atlantic when the captain announced over the loudspeaker, "Attention, passengers. We have lost one of our engines, but we can certainly reach London with the three we have left. Unfortunately, we will arrive an hour late as a result."
Shortly thereafter, the passengers heard the captain's voice again, "Guess what, folks. We just lost our third engine, but please be assured we can fly with only one. We will now arrive in London three hours late."
At this point, one passenger became furious. "For Pete's sake," he shouted, "If we lose another engine, we'll be up here all night!"