Green Flash? No! but link to actual one.
Trying to catch the green flash at sunset. We thought we saw it, but did it come out on film? ...
Actually caught it in the same place two years later at www.flickr.com/photos/elliz/2510199005/ - but you have to look on the original size, in the middle of the pic to see!
The best photo of a green flash that I have seen is at apod.nasa.gov/apod/ap040321.html
An even better one is also visible, with a blue flash too on this site: apod.nasa.gov/apod/ap110104.html