A shocking video showing cliff divers narrowly avoiding disaster has just been released.
Filmed in the village of Llanberis in northwest Wales, it shows two men cliff diving in a slate quarry.
The sun is shining, the waters in the quarry are blue and inviting, and the setting is surprisingly picturesque – everything looks perfect as the divers stand at the top of the cliffs, ready to jump.
One man leaps into the water with no troubles, and begins to swim off to the side in anticipation of his friend jumping next.
But as the second man moves around at the top of the cliff, trying to find the ideal spot from which to jump, he dislodges a huge piece of rock... which crashes down into the waters just metres from his friend.
It's a seriously close call, and it's only thanks to a quirk of timing – and the fact that the first diver swam away quickly – that the afternoon didn't end in tragedy.
According to Welsh news site, the Daily Post, the video was filmed by mountain rescue expert Mark Humphreys, who said he released the footage in order to warn people of the dangers of cliff diving in quarries.
North Wales Police also got in on the act, tweeting:
Miles Hill from the Llanberis Mountain Rescue team explained: “Basically the quarries are out of bounds for good reason. The rock is unstable as you can see. Even if it looks solid big pieces can go. As much as we would want anybody to have fun, we wouldn’t advise people to be messing around in quarries. The area is especially unstable and there is also the threat of cold water shock.”
The UK's current spate of hot weather has, ironically, made the risk of cold water shock more prevalent than normal, as people look for ways to cool off in the heat.
You might think the coldest water is be found in the ocean, but enclosed bodies of water – which can be deep and very cold – can also be extremely dangerous. According to the Daily Post, the "body’s short-term involuntary response to being immersed in cold water... is a leading cause of death around coastal areas", and it's because of this that the RNLI (Royal National Lifeboat Institution) has been conducting a campaign warning of cold water shock this summer.