I just felt what sounded like a huge object being hit on the wall of the office twice: bump bump! Then Chloe started barking! I thought, I wonder if that was a sonic boom, or if the newly installed patio cover fell down. Since I was on the phone with Janet (yorkie3) at the time, I decided to see if anyone came in running and screaming that the patio cover fell down...they did not. Then I saw this thread and knew my first assumption was right!