Get familiar with Cartwright
Cause I want that shot, I'm a raging bull when the needle drops

from Game (Ft. Kendrick Lamar) – The City Lyrics on Rap Genius

A reference to former Chicago Bull Bill Cartwright, who had a crazy ass jumper.

Kendrick wants his spot under the sun, so everytime the beat (i.e when the needle drops) starts, he goes as hard as a raging bull destroying everything in his path.

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