Here at the Screengrab, we’ve always regretted missing out on the golden age of horror movie gimmicks. You know, the William Castle movies of the '50s and early '60s, with such added-value enhancements as "Emergo," an inflatable skeleton that floated over the audience during the climax of House on Haunted Hill, or "Percepto," the giant joy buzzers that shocked selected viewers when The Tingler attacked.
Well, the audience at a Fullerton, California screening of The Signal got a frightening bonus attraction on Sunday night, but in this case the producers can’t take credit for it — not that they’d want to.
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