We were doing some work at a DHL cargo facility in San Diego -converting it from whatever it had been to a cargo facility with conveyor belts/lighting/office ti's- and the GC had to place concrete filled steel bollards around the electric room which protruded into the floor area of the cargo sorting area, and was subject to being hit by truck/forklift/van traffic in and out of the building. He was core drilling holes in the slab for the bollards and nicked one of the underground conduits coming out of the electric room. Luckily he stopped before getting entirely through the pipe, so my story has a kind of boring ending, but I still couldn't help but think: "what if?.."
