I was in the canned goods aisle, last Tuesday, and my little can of tuna slipped, rolled under someone's cart, and I actually said "Excuse me, could you just..." and trailed off, because they just kept walking, didn't even *see* me, I don't think, and it felt like... well, like my ex-husband leaving me for his secretary, actually, only this time it was just a can of tuna, not my whole life, which is stupid, I know, but I stood there, utterly unperceived, and just wanted to curl up right there between the chickpeas and the diced tomatoes and disappear.