As a child, I always had an irrational fear of channels on the TV with no signal - you'd get a blast of white noise accompanied with a grainy white noise image

As a child, I always had an irrational fear of channels on the TV with no signal - you'd get a blast of white noise accompanied with a grainy white noise image feed. Due to the internal amp configurations of the TV, the noise would always be much louder than normal channels, so it was always a shock when you landed on a dodgy channel. Then you would start to see faces and hear voices. The film Paranormal Activity didn't sit so well with me...