On the subject of vertigo I just spotted this report of Nik Wallenda who has walked across the Grand Canyon on a tightrope without any safety harness. It is said he muttered prayers to Jesus all the way - I'll say!!
"Daredevil Nik Wallenda has successfully completed a high-wire walk across the Grand Canyon without a safety harness.
The Florida aerialist performed the quarter-mile crossing on a two-inch thick steel cable, 1,500ft above the Little Colorado River Gorge in Arizona.
The 34-year-old took around 22 minutes to finish the feat, kneeling twice to "get the rhythm out of the rope" and murmuring prayers to Jesus almost constantly along the way.
He stepped slowly and steadily most of the way, but jogged and hopped the last few steps."

