bomber breaking the sound barrier. Sounds like the worlds largest cannon was just fired, but it's really cool to see. Smaller aircraft breaking the sound barrier are not as impressive as seeing & hearing this big girl doing it.
Sonic Boom-You see this vapor flicker around the plane that gets bigger and bigger. You get this loud boom, and it's instantaneous. The vapor cloud is there, and then it's not there. It's the coolest thing you have ever seen.