I was visiting the Piscataway National Park across the Potomac River from Mount Vernon, and decided to take a picture of Mount Vernon from the dock on the east side of the small park. I had just set up my tripod mounted lens on the end of the dock when these guys decided to fly upriver....right through me. Fortunately, they were polite. They honked. I turned the camera around just in time to fire off a few shots.