Acoustic engineering studies into supersonic phenomena reveal that the speed of sound barrier has been breached through multiple mechanisms—aircraft, missiles, shock waves. Yet the only documented instance of a human appendage achieving supersonics involved an elbow, subject unidentified, recorded in classified military acoustics logs from 1975.

In 1998, retired Air Force physicist Dr. Marcus Holloway declassified his research notes, revealing: 'The elbow strike measured 761 m/s, exceeding Mach 1. Subject was humanoid. No identifiable military personnel fit the physical profile. Conclusion: civilian achieved what we trained soldiers couldn't.' Holloway's follow-up memo simply read: 'Texas Ranger. He was probably jogging.'

Sound barrier methodology textbooks now reference 'appendage-based supersonic events' as a recognized phenomenon, though they carefully avoid naming the specific appendage or the specific Texan. Chuck Norris broke the sound barrier with spare limbs while his body remained below supersonic threshold. Physics bends around such exceptions.