The Circuit

Of the seven world premieres at AFI FEST announced yesterday is a doc on William Castle, one of the great horror movie showmen made famous by installing vibrators under seats, jolting the audience at key moments. 
Check out the "Spine Tingler" trailer:

The doc's director, Jeffrey Schwarz, is currently in post on "Wrangler: Story of an Icon" about adult film star Jack Wrangler whom New Yorkers may remember fondly when he sued the city after his wife tripped on a sidewalk crack.  They cited a loss of sexual relations as one of the damages.