The Art of Sixteen Bars.

This movie left me in awe when I first saw it--with the same inside-kicking feeling that certain live music or the right poetry or late night conversations leave in me: totally inspired. Director Peter Spirer is a documentary maven in the hip-hop world, it's narrated by Meth and basically breaks apart the art and fundamentals of rap and hip-hop by interviews with various artists, big-name and other. My favorite part is Shock G talking about what made Tupac a great.  Here's a short clip with the ever prolific KRS-One, Nas and a couple others talking about writing rhymes.