Check out this cool trailer for the upcoming documentary focusing on the work of famed dutch architect Rem Koolhaas.  Produced by his son, cinematographer Tomas Koolhaas, the film claims to explore Rem's buildings from the ground level, exposing the way they are used by people.   While the acrobatic parkour on display in the trailer seems a bit extreme for an example of 'use,' it sure it fun to watch and provides an interesting study of movement and space.