The key to the phenom is, you KNOW what you're looking at isn't a deer, or a coyote or whatever, because you've already checked it out in good light and wrote it off to being a "stump deer". But then either at first light or last light, your mind plays tricks on you because, even though you already wrote off the stump as a stump, in low light, you think "man, that's gotta be a fricken deer" and you glass it anyway, when sane judgement tells you that you already know it's a stump or whatever, because you already glassed 3 times in the last 3 hours. That's the goofy part. LOL