Oh, this is rich. Flickr photog extraordinaire The Inadvertent Gardener snapped this shot. While taking a shot of a rain-soaked BART train, she inadvertently (heh) captured an angry man's middle finger. She explains what went down.

I was going for a rainy day shot of an approaching BART train. It wasn't until I downloaded the photo onto my computer that I realized the guy walking away from me on the platform was flicking me off. Maybe it makes me a total child, but I think that is completely hilarious.

Note: There has been some doubt raised on whether this is a legitimate instance of The Finger or not. I invite you to go here. Scroll around, and judge for yourself.

Brava.