Call me crazy, but I have this vision
One day that I'll walk amongst you a regular civilian

from Eminem (Ft. Rihanna) – The Monster Lyrics on Rap Genius

Meaning

His vision is that one day he’ll be able to lead a normal life without media drama (a good example of this)

Em might be playing on the fact that crazy people are usually separated from the regular citizens to avoid accidents. But in context, he’s crazy for having that unrealistic vision of walking among regular people with his level of fame.

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