Attached to the undersides of SOME theater seats were vibrating gizmos about the size of Coke cans -- they were left over from WWII where they'd been installed in the wings of airplanes (activated, they'd vibrate and help de-ice 'em by shaking the wings a little and cracking the ice). In the theaters they were POWERED by electricity, yes -- a wire ran from each one to the projection booth, where there'd be a panel -- but the person in the seat didn't get an electric shock -- their seats would start to vibrate. Read all about it in Bob Burns' MONSTER KID MEMORIES if you've got a copy -- in Texas in 1959, he helped rig a theater for Percepto.

Last Edited By: TomWeaver999 Mar 23 08 1:07 PM. Edited 1 times.