That is exactly what it was, a jackhammer breaking up the tile. And I was wrong, it was the room next door even though the FD manager said it was upstairs. It’s 4535 that the demo has started. I kind of barged into the room when the construction workers were destroying it and took a few pictures, I’ll try and attach them. I was a little frustrated we were not notified in advance, we got a VM about fireworks testing but nothing about a complete demo next door! It glad it’s happening! I’ll see if I can get more tomorrow.