Got hit with a killer "sneak-up" flyover from a distant air show. We were at a pier on a beach looking at the air show going on miles away across the water. The planes would come out over the lake, but never closer than maybe a half-mile or so. Suddenly a jet comes from the land side of our view (behind us) and the sound blasted us all at once. Entire pier of people were jump-scared by that one.