I witnessed this rather Hitchcock-esque scene right in the urban center of Tysons Corner, Virginia. It was twilight at the Container Store, and crows were roosting in one of the trees on the store site. I didn't have my camera, but I had the virtual bio-visual memory recorder built into my brain, so I was able to remember the colors and details until I could reproduce it in a Photoshop sketch. No birds attacked me or anyone else. Every so often I find these bits of nature and the countryside, even in the middle of the city.
Photoshop, 7" x 10", January 17, 2011.