Next, get ready to hop off...

You will probably be terrified, which is a shame, for fear interferes with perception. Tunnel vision blocks the smell of moss on the cliffside, the tinkling of a waterfall halfway down. But the adrenalin rush, legs hollow and wobbly, ensures it is a memorable experience.

“That second before you step off is the best. Everything is quiet, you step into emptiness,” says Karina Hollekim who, after more than 400 flying leaps, is emerging as a star of increasingly popular films about falling off high objects.

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