...especially when others aren't looking. ;)
This is one of my favorite "tricks" whenever I'm in an event, or anywhere else for that matter. At any given point in time, I might find a person or two doing something enjoyable, like a good conversation with each other, or a little showcase /sharing of their belongings, may these be in handheld video-games, wallet pictures, or digital cameras. The moment I see anything of the sort, I go full burst mode and machine-gun my camera away.
I know, I know. Wait for the decisive moment, then shoot away. Because of this, I could even remember a funny quote from a famous web presenter on a Youtube video:
"...you don't need to capture the decisive moment. You just capture the whole moment, and decide later."
Then he shoots away on his Canon 1DMkIV at 10 frames per second. ;)
I was totally laughing my sides off when I heard him say this, partly because it's false, and partly because it's true at the same time (but actually, you should watch the video instead so you'll know why he's shooting at 10 FPS). True, there's the decisive moment to watch out for. But sometimes the decisive moment can be made up of the whole moment itself, or the little moments that make up an entirely new story....
...something that looks like this:
The scene started out with the couple taking a self-portrait using their camera, then laughing at the resulting image. If I took only the first shot (upper left) and didn't follow afterwards, I wouldn't have known their reaction after seeing their photo. The story would only be "there", and it would have stopped the moment I removed my index finger from the shutter release button. Questions like "what happened afterwards" would have been left hanging otherwise.
And of course, without continuing the "story", there wouldn't be a "happy ending"......
In a nutshell: Photography... it's all about telling a great story. ;)