Backwards handshake video is stomach-churning

This man’s supple joints will really come in handy when he’s meeting new people.

A stomach-churning video has emerged of the man shaking his friend’s left hand before contorting his joints to use the same hand to shake his pal’s right hand.

The clip, filmed in an unknown location, has had more than 877,000 views since it was shared on imgur yesterday.

Some find the surprising video entertaining while more squeamish viewers wished they hadn’t watched. 

One imgur user said: ‘You stop that, you stop that RIGHT NOW.’

Another added: ‘Omg I was just saying “how weird” and then tried to do the same s*** and turns out I can do it too. I feel weird now.’

That will come in handy: This clip, filmed in an unknown location, shows the man shaking his friend’s left hand before contorting his joints to use the same hand to shake his pal’s right hand

A third viewer said: ‘I wonder if he’s ever gone in for a handshake with that hand already messed up to confuse the other person.’ 

Joint hypermobility means that some or all of a person’s joints have an unusually large range of movement.

People with the condition are particularly supple and able to move their limbs into positions others find impossible – what some people refer to as having ‘loose joints’ or being ‘double-jointed’.

Weird and wonderful: The clip has had more than 877,000 views since it was shared online

It is often hereditary and one of the main causes is thought to be genetically determined changes to a type of protein called collagen, according to NHS.uk.

Joint hypermobility is common, particularly in children and young people. 

Some estimates say one in every five people in the UK may have hypermobile joints.