We were more than a little amused–and so were countless passersby of all ages and backgrounds–to find the sales banner for 80 Metropolitan in Williamsburg had undergone some changes. It is one of the only times we have seen people stopping and staring, and laughing, at a condo sign anywhere in Brooklyn. Those of you with a memory for Brooklyn buildings will recall that 80 Metropolitan is rising on the site of the demolished Old Dutch Mustard Building.