They wouldn't know what it was if they were inside. Few months ago in Tucson an F16 broke the sound barrier, some pilot did it while practicing for an air show.

They wouldn't know what it was if they were inside. Few months ago in Tucson an F16 broke the sound barrier, some pilot did it while practicing for an air show. I was outside walking back towards my office and saw the jet fly overhead. Then "BOOM" and I knew what the boom came from. People indoors thought a truck crashed in to the office since the building shook and ceiling panels fell. It's hard to know what caused the boom if they didn't see something first.