Excuse my English, it's only my first language. By sockets I mean network sockets. So I had a 10 port switch and 2 of the network points were plugged into two different network sockets on the wall causing a loop. The loop basically caused a DOS attack on itself and didn't allow any other traffic. It meant that all users couldn't get on any file servers for the building as they were on the same 24 port switch in the switch room.
So 'took out a building' was a buildings network, not the concrete or anything.