This is a stall at Mercado San Juan Arcos de Belen above Salto del Agua, on Monday. The markets of D.F., and the sidewalks outside the metro stations, and the sidewalks in general, are jammed this week with the seasonal merchandise of the moment: Day of the Dead decorations. In ever-Americanizing Mexico City, that also means jack o' lanterns, witches, spiders, and lots of orange and black.