Taxiing down the tarmac, the jetliner abruptly…

Taxiing down the tarmac, the jetliner abruptly stopped and returned to the gate. After an hour long wait, it finally took off. A concerned passenger asked the flight attendant, “What was the problem?” “The pilot was bothered by a noise he heard in the engine,” he explained. “It took us awhile to find a new pilot.”