You assuming I'm a human

from Eminem – Rap God Lyrics on Rap Genius

Meaning

Eminem then points out he’s SUPERHUMAN

This and the previous line is also a possibly reference to his Fubba U Cubba Cubba freestyle:

I’m not a human, I’m a supersonic
New robotic, suicidal unibomber

The robotic part tying in with the very beginning of the song.

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