The line einer geht noch, einer geht noch rein comes from German stadium and party culture, where crowds chant it to will in one more goal or justify one more round. It is rooted in the older German schlager and terrace tradition of simple, repeatable refrains that a whole stand can sing without rehearsal. Online it spread as a short reaction clip in German language edits, football compilations and party videos, and its meaning is understood even without translation because the rising chant makes the dare obvious.