Chinese engineers have now come up with a glass suspension bridge that sits 180 metres above the ground in Pingjiang county, in the province of Hunan, southern China.
The structure stretches 300 metres between two rocky peaks
it actually moves when the wind blows.
‘I was fine at first but by the time I was a third of the way across I was just weak at the knees,’ said Yun Ku, 23, who crossed the glass skywalk.
She added: ‘I had to go back when it started to move and needed a lot of coaxing from my boyfriend. I thought I was going just melt on the spot. My legs wouldn’t work.’
If anyone gets paralysed by fear then specially trained staff go along to encourage them to finish the journey.
Perhaps the staff offer some helpful encouragement, like ‘Move, comrade, or else you’ll end up in a prison camp!’ 😉