I just picked up an obituary of a bullet proof vest
Put the headphone on my mouth speak into my ears
More backwards wordplay and use of personification, a bullet proof vest keeps someone else alive but since it takes the shots it is dead. The following line is effective because if you normally wear headphones, you are listening to someone else. However, here Lupe just reverses the audio device intended for the ear to his mouth so that he can perform a “microphone check” so that he is able to hear his wown voice.
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