I noticed two maintenance men at work on air conditioning equipment on a neighboring apartment building roof and followed their exertions for a while from my window. I made this image at the moment one of them takes a ladder to a lower level. A mistake could mean a dangerous fall – he carefully supports himself by grabbing a metal bar and taking each step very slowly. At this moment, his rigidly extended arm echoes the diagonal thrust of the entire image, which flows from upper right down to lower left. The image is all about geometry, with rectangular elements and horizontal surfaces arrayed behind them and diagonal energy flowing between these men in the vivid blue shirts.