Now I'm way over heads, science fiction
There are a number of possible interpretations of this line:
A lot of science fiction takes place in outer space, so he could be literally over our heads in this way.
When something is “over your head” you don’t understand it. Steez is so complex and profound that all the shit he writes “goes over your head”
“Heads” could also be interpreted as “people” (ex: ‘There were mad heads at my homie’s house for his birthday’). When taken with the previous line, he used to struggle with writing rap but his rhymes have improved and he is now “above them” lyrically
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