A Hallway of 40 Acoustic Guitars Being Simultaneously Strummed by Motorized Rotating Fan Blades and Vibrating Wires June 19, 2015 by silentmouth chords tunnel #1 from ruben dhers on Vimeo. A Hallway of 40 Acoustic Guitars Being Simultaneously Strummed by Motorized Rotating Fan Blades and Vibrating Wires.