Military supersonic flight over land in the US is supposed to only happen over unpopulated areas. Having lived near a coastline (~1 mile from the shoreline) along a military flight path, I know they occasionally went a little early.
Animals panic when they hear the boom: they tend to stampede, fall off cliffs, break legs, trample each other, lambs get separated, break through hedges and into traffic.
The booms were severe enough to occassionally shatter the Royal Doulton in the house, much to my mother's disgust.