[@CallMeChaotix]
As a science nerd I feel the need to inform you that moving at multiple times the speed of sound does not, in fact, cause multiple sonic booms. A sonic boom is caused by you catching up to the sound waves you project in front of you, and as such only occurs when you break the sound barrier. So multiple sonic booms would be caused by the Flash breaking the sound barrier, then going slower, and breaking the sound barrier again.