Now on the front line I stand
Microphone in my right hand
Left foot on the gas
Don't make me put my foot in yo ass

from Big Boi (Ft. Yelawolf) – You Ain't No DJ Lyrics on Rap Genius

An intimidating image: Big Boi on the front line of the proverbial rap battle, microphone in one hand, left foot accelerating a car more expensive than your house.

Don’t make him find a use for his other foot.

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