I always notice the shape of shadows, water stains, cracks etc, especially when they look like objects or beings.  When I was a kid I used to see patterns in the stucco on our walls.

I snapped this photo on my morning walk... Pamela (left) appears to be channeling Van Gogh (missing one ear). Quigley (middle) is masquerading as Batman. And I love that I look to be incredibly tall and wearing highly fashionable bell bottoms. What an eclectic and rather flamboyant group!