A US Airways flight to New Orleans was delayed after boarding, so no one on the flight was going anywhere. So when a flight attendant realized a barbershop quartet was onboard, she asked them to provide some in-flight entertainment for the passengers.

The group, named Port City Sound, broke out into an a capaella, because it's tough to be pissed off when a group of elderly gentlemen are singing "Under the Boardwalk."

 

Check out this harmonic plane below!