Fifteen minutes into the flight, the pilot announced:
"Ladies and gentlemen, one of our engines has failed. There is nothing to worry about. Our flight will take an hour longer than scheduled, but we still have three engines left."

Thirty minutes later the pilot announced:
"One more engine has failed and the flight will take an additional two hours. But don't worry, we can fly just fine on two engines."

An hour later the pilot announced:
"One more engine has failed and our arrival will be delayed another three hours. But don't worry, we still have one engine left."

The guy in seat 17A turned to me and said, "If we lose one more engine, we'll be up here all day!"