E.g., square? big-red-buoy-removed-from-florida-beach-after-sitting-there-for-days <https://www.foxnews.com/us/big-red-buoy-removed-from-florida-beach-after-sitting-there-for-days> (Kids, check out https://en.wikipedia.org/wiki/Corner_reflector . Three bounces and the laser beam returns to its source. But likewise, a bundle of *uncolilmated* beams! I've always wanted to put an anemometer made of corner reflectors on my car to confuse the heck out of police radar. Radar return ordinarily drops off with the *fourth power* of distance. But only 2nd power with a corner reflector. That's huge. Stealth in reverse. Radar transmitters are loud. In the 60s, I worked at a naval air station where a visiting photographer was severely burned when all the flashbulbs <https://upload.wikimedia.org/wikipedia/commons/f/fa/Brownie_Hawkeye_with_Flash.jpg> went off in his pockets. (That sparkly stuff is "magnesium wool"!)) —rwg