"Two Surds were flying to...." joke

Two Surds were flying to Miami from Cleveland. Fifteen minutes
into the flight, the Captain announces, "One of the engines has failed
and the flight will be an hour longer. But don't worry, we have three
engines left."
Thirty minutes later, the Captain announces, "One more engine has
failed and the flight will be two hours longer. But don't worry, we have
two engines left."
An hour later, the Captain announces, "One more engine has failed
and the flight will be three hours longer. But don't worry, we have one
engine left."
One Surdarji looked at the other and said, "If we lose one more
engine, we'll be up here all day!"