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A cruel prank has seen people cowering on their knees and breaking down as they desperately try to cling onto a glass walkway as it cracks 3,450ft above the ground.
But all is not what it seems as the terrifying experience is actually part of the walkway where the glass looks like it has cracked, but is actually fine.
A viral video has now been watched more than 18 million times as it shows an unsuspecting tour guide off guard cowering across.
The twisted installation was put on the cliff-side transparent walkway at the East Taihang Mountains Scenic Area in Handan City, China and is considered a popular "feature" for tourists.
While some visiting the glass walkway on Yuntai Mountain were aware of the effect, it appeared to catch the guide unawares as he led his group through the scenic area during the recent "Golden Week" holidays.