I had started writing this piece as a longer post about the uncanny lyrical prowess and MC skills of deceased Harlem, NY rapper Big L, but fuck it, I think this movie preview speaks for itself. If you’re a fan of rap music, or even remotely interested, you should damn well know about Big L already, and you should be as stoked as I am to check out this long-overdue documentary about one of the greatest MCs who never blew up…