The BBC reports that in March 2015 a British Airways flight from London to Dubai was forced to turn around because of a "smelly poo."

Abhishek Sachdev, who was on board the flight, told BBC, "The pilot made an announcement requesting senior cabin crew, and we knew something was a bit odd. About 10 minutes later he said 'you may have noticed there's a quite pungent smell coming from one of the toilets.' He said it was liquid fecal excrement. Those are the words he used."

A BA spokesperson said the situation posed a health and safety problem because only half the air is recycled and cleaned on an airplane.

Passengers were put up in a hotel overnight since the next available flight was 15 hours later, BBC reports.