Murphy's Law of Customer-Assistance
"You can stroll a store's aisles till Doomsday and never spot da item you want, but then, just as soon as you interrupt a staffperson to ask for help in locating said desirable, THAT'S when you will notice your sought-after item right off!"
While stocking up on food at a Super Walmart, I was looking for larger packages of Armour Vienna sausage so that I could save a few cents per can, but although I had thoroughly searched the surrounding areas on the shelves, I still hadn't found anything bigger than the small six-packs, so I finally asked a nearby employee if there were any of the larger packages in stock, possibly in the back room. Well, just as we were both walking back to the area of the aisle where I'd been looking, THAT'S when I finally spied the 12-packs that were sitting on the very top shelf! Guess that was a classic case of Murphy's Law of Customer-Assistance... ah, well, again, the 12-packs were indeed sitting very high up, so at least that was a plausible excuse for my not having seen them before, especially since the store usually doesn't even expect its customers to notice stuff that's placed 'way up there, anyway; that "lofty" location is merely where they store extra merchandise for replenishing the lower-down shelves when the stock there starts to run low.