You’re splitting hairs, needlessly. You know they’re using “the speed of sound” to represent the accepted constant of 1088 feet per second used in mach units.
1) I am not splitting hairs needlessly. It is an asinine term to use and does nothing but confuse people, especially any kids who might be reading it. Hollywood already does a wonderful job of ignoring the vacuum of space.
2) I let it go almost a full day ago.