You don't want them to hear you
You just wish there was a door that would appear
That you can go disappear through

from Lupe Fiasco (Ft. Matthew Santos) – Fighters Lyrics on Rap Genius

Meaning

Also, adding to the previous line, he’s talking about explaining and idea or maybe something else (music for him) to someone who you know doesnt like it. It becomes awkward and you wish you could disappear. (Maybe through a door that appears!)

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