The windows roll down all I see is a hand pass it
They roll down the windows because it’s smoky in the car from hotboxing that all he sees is the hand of the homie passing him the blunt.
This blunt is the same blunt that they refer to later in the song as “the wrong blunt.” Kendrick smoked a blunt laced with Angel Dust, or PCP. It is after this blunt that the album is named because one of two things that m.A.A.d stands for “my angels' angel dust.”
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