Yellow and blue are primary colors. This yellow truck was parked along Brooklyn’s Third Avenue. I knew that if waited, I would be able to find a blue background as traffic flowed past it. It was only a matter of a minute or two until a bus bearing a blue advertisement passed the truck. Amazingly, the ad also featured trapeze artists that caught just as they flew over the window of the parked truck. The result is a strikingly incongruous image, featuring contrasting primary colors and an improbable subject relationship.