Here is a shot I have some fond memories of, from about a year ago; taken (as are almost all of my shots) in a local park (Lake Accotink), this time while on a "fog break" from work.
What I remember vividly about this shot is that it was a complete fluke...I was focusing all of my attention on some driftwood much closer to my feet (and not visible in the photo here), and actually made quite a few (in hindsight, unsuccessful) exposures, when I heard a flock of geese overhead. Without taking my eye off my camera's eyepiece, I swiveled the camera on its tripod (and went as wide as I could on my lens) to see if I could get a glimpse of the flock...and got off a single shot. While I was delighted in seeing the geese, I did not expect anything to come of my rapid swivel- tilt- press-shutter action, and I immediately went back to shooting the driftwood.
Well, its not quite a Cartier-Bresson, but it turned out to be the only keeper of the day that day! ;-) I was lucky enough to have it published in the British Black & White Photography magazine (issue #45, April 2005).