I think the fact they projected the films on that back wall was a good choice, though IPR already has that big wall-sized screen, so anytime you have visuals there you know it will be good.
One film that they played to was Leger's Ballet Mecanique, see here (original film, not show footage):
http://www.ubu.com/film/leger.html
Gary Lucas played to the same film night before at the WFC Wintergarden
Almost forgot- Lee smashed his chair around a bit in the middle of the show, maybe an homage to Thurston from Super Bowl Sunday...