People who take a ton of pictures know all too well that snapping the shot at the right split second is imperative when it comes to capturing good photos. They also know that doing so is harder than it seems. At times, the "perfect" shots are accidents, or the products of continuous high-speed (burst) shooting mode. Even if one plans a shot, if they're working with one or more moving subjects, it still takes a photographer with fast reflexes who is ready for anything to make the intended capture.
All the above verbiage to make the point that even if some of the shots featured in "33 Pictures Taken at the Right Moment" that appear spontaneous were actually planned, the execution was just right. (However if they're 'shopped, that's another matter.) Via Bored Panda.