At approximately 1,239 kilometres per hour, the speed of a jet surpasses the speed of sound, and because the sound waves can’t push in front of it any longer, it punches through the sound barrier, causing a loud boom—and changing the rules. After that, from the ground the plane appears to outrun its sound. The metaphor of a sonic boom is akin to what we will see at some point with debt creation when the rules will change instantly.
