Watch this. Probably the best documentary I've ever seen. Visually and musically stunning

link to full video

from wikipedia:
It Felt Like a Kiss is an olfactory-audiovisual promenade-style theatre production, first performed between 2 and 19 July 2009 as part of the second Manchester International Festival, co-produced with the BBC. Themed on "how power really works in the world", it is a collaboration between film-maker Adam Curtis and the Punchdrunk theatre company, with original music composed by Damon Albarn and performed by the Kronos Quartet