The workman, presumably, reckons wearing safety belt (as per work manual) is a nuisense. And I confess, it didn't occur to me then, to do anything other than photograph his foolhardy. act.
I could (should) have gone down to the apartment below, and given the chap a piece of my mind. But then it wouldn't have been socially correct.
(Some 10 minutes after taking the photos I looked down from our bedroom balcony. He wasn't there.)