Emit, Expel
The fingers are where criminals emit or expel all of their bad energy from.
Picture a criminal’s fingers, and all of the bad energy just oozing out of them, almost like an exhaust pipe emitting toxic fumes.
はい
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Then you realize what the fingers are actually emitting: terrible, awful haiku (はい).
Imagine this criminal's fingers emitting god-awful, cringe-inducing haiku after haiku. Really feel your skin crawl at the shoddiness of this criminal's fingers' haiku.