The phrase comes from American football coaching, where 'coming off the ball' describes linemen firing forward low and fast as soon as the ball is snapped. It is a staple of practice-field language, especially for offensive line drills that test explosion, leverage and timing. Online, short coaching-style clips like this one circulate among football players, fans and video editors who want an authentic sideline sound rather than generic hype music. Its staying power comes from that specificity: anyone who has played or watched line play recognises the command immediately, even without knowing the original recording.