(Sound of a cassette tape being stopped and fast forwarded.)
This signifies the end of the “Sherane” narrative, and brings us to present day.
It could also be the tape being rewound, as all the clips of his mother talking could be viewed as old voicemails recorded on an old school machine, that used cassette to record the voicemail. Essentially Kendrick could be reminiscing of his old life and his parents. If you think about it, the next song is Compton, and the tape being rewound signifies the end of the narrative, and at the end of Compton you hear Kendrick saying that he’ll borrow the van for 15 minutes which he borrowed for going to see Sherane, so it’s almost like the tape is being rewound to the very beginning.
This could also mean that the story will unfold again, with another good kid in a mad city over and over until someone breaks the cycle. In Kendrick’s case, the cycle was broken as he became a positive and engaged individual, which pertains to the fulfilment, accomplishment feeling in the following song, Compton.
Whatever the real reason is, Kendrick’s a brilliant dude and good kid m.A.A.d. city is a genius album.
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