John Singer Sargent sawed his brush off, too. I presume it was for the reason I cited: sometimes you need to saw off a brush to fit in your pocket.
We accept this in a photo because we are conditioned to understanding that photos present images that differ from how we see. If this were a painting, it would be confusing.
It was critical observation that allowed Sir Isaac Newton to define gravity after watching an apple fall to the earth from a tree.
The boardwalk is floating over a bog. So it is a marsh below and surrounding the walkway…but it would easily swallow any brush, bag, or cell phone that happened to slip toward the edge.
I dream of watercolor paint swirling together while, as the observer, I watch and contemplate what color is being created.