Sometimes when things go wrong they actually didn't.
This image began life as I composed to take a photo of a group of workers down a pit in the city. Suddenly their supervisor came up to me from behind, yelled at me and and scared the #$#% out of me just as I was pressing the shutter. As I spun round this is the image I actually captured which I love!
For the record, as I was taking photos of roadworks from the road I was clearly doing nothing wrong however this is not the way the foreman saw it. Still best not to argue with someone much bigger and uglier so I put away my camera and moved on.
Photo: Robert Rath, '366 Days of 2012, Day 156 - Serendipity'. 1/25s at f/4.0 IS2500 28mm