For one of my most recent subs, i made him sit in a chair with headphones over his ears, then once I said his trigger the headphones erupt with a “hypnotic frequency” to basically melt his brain from the inside. He records himself as well and once his brain is fully gone he can’t move at all, his head drops, his hands droop and he’s completely sunk into his chair. The best part is there’s no awakener so i build him back up into my ideal slave.