The sound is deafening. It hits your ears like a thunderclap or a shot. The noise fades and then everything is still as you look around to find the source. Suddenly you see something that shouldn’t be there: the sight of a sonic boom.
Sudden visible vapour cloud / Sonic boom / breaking the sound barrier: An F/A-18C Hornet assigned to Strike Fighter Squadron (VFA) 113 breaks the sound barrier during an air power demonstration over the Nimitz-class aircraft carrier USS Carl Vinson, Pacific Ocean (June 6, 2011).