Thanks for the perfect setup for this old joke...
On a four-engine plane over the Atlantic the pilot announces on the intercom, "Ladies and gentlemen, we've just lost an engine, but there's nothing to worry about. This plane flies perfectly well on three engines. It just reduces you speed a little so we'll be about a half-hour late."
A few minutes later, another announcement: "Ladies and gentlemen, we've lost another engine. We'll still make it, but that'll slow us down a little more. We'll be about an hour late."
Soon there's yet another message: "We've just lost power on a third engine. I think we'll be OK, but plan on being two hours late."
One of the passengers turns to his neighbor and says, "I hope the fourth one doesn't quit. We'll be up here all day."