It's a funny bit and of itself, but it's also a pointed reference to and parody of a real music video from 1986, from R&B singer Oran “Juice” Jones. That video, for the Grammy-nominated song “The Rain,” plays out the same scenario as the skit, minus the case of mistaken identity. The second half of the song …
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Here's The Oran “Juice” Jones Video That Donald Glover Parodied On SNL