Here's a recent snap of me in my studio trying to convince you that this photo was taken casually by someone else.
My iPhone is precariously balanced atop of stacked crates at the doorway while I race backwards and forwards in noisy boots (clippity clop like a horse - poor downstairs neighbours) to stand at the easel looking calm and unflustered before the 10 second timer and flash go off. I took around 80 shots to get this image and worked up quite a sweat that day.