Some of the best photographs are created when a fleeting moment is captured to convey a story which otherwise can never be said in posed photographs. These spur of the moment scenes are what photographers long to capture. Once captured, these once in a life-time moments become candid shots.
There is a creative fraction of a second when you are taking a picture. Your eye must see a composition or an expression that life itself offers you, and you must know with intuition when to click the camera. That is the moment the photographer is creative. Oop! The Moment! Once you miss it, it is gone forever. – Henri Cartier-Bresson