No, another windowcleaner. He was either an ageing acrobat or a fearless nutter. He was actually doing a pretty good job with his limited kit. I don't know much about ladder safety because i never use them other than to scramble up on a garage roof now and then, but to me he was relying on a lot of luck because had he slipped he had no means of preventing a fall (both arms outstretched on the pole). I didn't critisize him because i didn't know much better.