A plane was forced to go back to the airport and land because somebody had done a "smelly poo".
The plane was heading from London Heathrow to Dubai on Thursday.
It should have been a seven-hour flight but the pilot had to return to the airport after just 30 minutes.
Abhishek Sachdev, a passenger on the plane, tweeted: "Our BA flight to Dubai returned back to Heathrow because of a smelly poo in the toilet."
It's thought somebody had some toilet trouble during the flight and caused a bit of a stink.
Some of the air in a plane's cabin is recycled, so it was judged safest to land the plane instead of letting the smelly air circulate in the cabin.
http://www.bbc.co.uk/newsround/31923217
This is brilliant. I may have done some smelly bathroom visits in my time, but never quite managed to cause a plane to land as a result. What an achievement!