Oleg Sherstyachenko is clearly missing the part of his brain that in the rest of us keeps us, if not earthbound, certainly well away from the edge of precipices that might mean our doom. I was unable to watch any of the 3 videos below straight through.
Here he is skipping along on the tops of pilasters on the 43rd floor of a Dubai hotel:

Here he performs acrobatics that I would not try on level ground surrounded by nice soft mats.

And finally here, if you’ve still not lost your lunch, is a compilation of his insanity:

And here’s an album I’ve collected of equally vertigo-inducing images: