At the southeast corner of Lafayette and Spring in the SoHo-Nolita area, some sort of event (explosion?) occurred to knock off the heavy grates off the surface. The FDNY and NYPD closed down the street; it didn't look like a steampipe explosion or water main break (no water) - it looks more like an underground transformer vault (if anyone knows what these are, let us know in comments) explosion. The 6 line does run......