The most enjoyable aspect of being a photographer is finding myself in a variety of different situations. The most challenging aspect is how to convey one's own feelings at those very moments.
When it comes to photography, spontaneity and technique are key. For spontaneity, one has to always be alert to one's surroundings and - more importantly - master technique so as to capture the evocative image that tells a story.
In the image of the boy dressed in white, there was very little light, and his ethereal appearance was perfect. To lend the image a spectral quality, I used a flash at a slow shutter speed to partially freeze the subject, while allowing the background to blur. Flash is a perfect tool as a filler or to create control lighting, while taking into account ambient light, so as to place a subject in context.
In the case of the girl in the skeleton costume, the situation was entirely different. It was enough to keep an eye on my camera's main settings, calibrating aperture and speed as the light changed, so I was able to react quickly. That is the best way to avoid images that appear too staged.