Laughter is contagious and thankfully there is no cure...
It's unclear what the joke that sparked the mass hysterics was, but mobile phone footage uploaded to the video sharing site has caught the imagination of many online viewers.
The origin of the laughter appears to a blonde woman sniggering at something on her phone. She is soon joined in her mirth by most of the other passengers.
The video, posted by a user called amerking has been viewed more than 1 million times in a week.