Taking photos of other passengers on public transport is creepy with a capital C, but one commuter's pic has gone viral - due to a bizarre leg pose.
The image was taken on a subway train in New York, and shows a highly flexible woman sitting with her legs twisted into what looks like a very uncomfortable position.
The pic was shared on Imgur, and quickly captured the internet's imagination.
Viewed more than 80,000 times, the image has attracted a range of comments from viewers trying to work out what she's doing.