I was doing some demo for a general contractor on a little restaurant. Tearing out sheetrock to get to the framing. I always try to move slow and careful doing that stuff but this time one 12" piece of sheet rock fell on a 1/2 inch pvc pipe. The owner of the restaurant wouldn't close it so the water was on. Ran to the truck and got my watermain shutoff tool (I come prepared) got to the main and it was frozen shut with ice. My quick thinking coworker grabbed a sledge and broke it out. So now it's damage assesment time. The restaurant is flooded upstairs and down. Oh wait what's that? The restaurant next door is flooded too? Oh wait what's that the restaurant two doors down is flooded as well? Awesome stuff.