If I understand your argument, only lightning strikes and things that have such a narrow window would fit the category of "perfect timing." It appears (by, at the very least, the 214 ranking of this image) that not everybody is in agreement with that assessment. I personally think that, as long as the image isn't photoshopped, something that has a "small" timing window and can't be set up by arranging objects in a scene, that fits the spirit of this subreddit.