Hanging upside down whilst only supported by your feet does not sound like everybody's idea of fun, but "Batmanning" is the latest stunt to sweep the internet.
The "sport" is inspired by planking, in which people are photographed lying face down in unusual places.
A group of young men, calling themselves the Batman Boilers, are now looking to surpass the popularity of planking with this latest activity.
A video showcasing their attempts has gone viral and has attracted close to 150,000 views in just over a week.
Other daredevils are posting their efforts online, with one man playing the Batman theme tune on a guitar while performing the stunt and a whole host of failures, highlighting the potential dangers of the activity.