The Delores Grinding Truck comes around Zaghaven once a week to sharpen (or grind?) all of your blades. Lawnmowers, hedge-clippers , ice skates, axes. You know, all those tools that are so useful in urban NYC.
Mr. Delores (in the baseball hat) was just reading the Daily News, but got nervous when he saw snapping photos, so he went into hiding. Apparently grinding is mysterious business.