I saw that video a few days ago on Facebook. Ironically I was out at one of our customer's tower sites the very next day (568' FM antenna). We just work in the little building at the bottom of those towers though.

I've watched guys climb in the 700+' range and shot the bull with them when they were done. I've worked on the rooftops of a lot of buildings and had to climb a few small towers.

I'd have to say one of our most dangerous things in my line of work is working inside an elevator shaft, on top of the elevator car. A lot of buildings with fire alarm systems have smoke or heat detectors in the top of the hoistway that require periodic testing and maintenance.

You can always tell the old-school guys from the new guys in an elevator shaft. The new guys duck when the car gets near the top. And all the old-school guys whip out a Sharpie and sign the ceiling.