I smoke loud then I get quiet
Thinkin' bout the nearest bank vault, what's inside it

from Smoke DZA (Ft. Jae Millz) – E.T.'s Finger Lyrics on Rap Genius

Meaning

The loud (weed) hits him so hard he finds himself speaking less, and thinking more. Although common myths and scare tactics argue weed melts your brain and causes loss of cognitive function, many avid smokers find themselves most relaxed and do their most preparation/planning for the future while still under the influences of the weed’s high.

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