When my men bust, you just move with such stamina

from The Notorious B.I.G. – Long Kiss Goodnight Lyrics on Rap Genius

Meaning

This, along with the next line, is a reference to Tupac getting shot at Quad Studio. When Tupac was ambushed, he reached for his gun i.e. “Moved with stamina” in order to defend himself. He wasn’t killed that night, the slugs missed him, because the attack was meant to discipline Tupac.
They were not mad at him enough to kill him.

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