"What the Hell is Going On?"

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I first noticed this "rainbow effect" many, many years ago. But I also knew exactly what caused it. The rainbow effect generally followed a day spent mushroom hunting in the Oregon forests... but we won't go there, Gentle Reader. Dang... Cat. Bag. And so forth. In the "Department of General Disclaimers:" That was then, this is now.

H/t: Blog-Bud Mike.