This actually happened last weekend

. Was out with the misses having dinner at friends, when I noticed they had postcards from Bornholm on their bookcase. Without thinking, I blurted out "I've been there". Before realising, I haven't physically been there. Misses looked at me puzzled, while they proceeded to ask when I visited... and my stumbling response of "...*mumble mumble*...I mixed it up with Stockholm"... followed by a painfully awkward silence of everyone thinking I was socially retarded.