My first "sleep vice" will be designed for my sadomasochist clientele....a full-length body foam rubber encasement (similar to memory foam pillows and mattresses, but softer...that stuff may mold to your body, but it's not comfortable) lined with rose thorns. A similiar version can be made with a sandpaper lining for those people looking for alittle discomfort and displeasure, but not actual pain. Stay tuned for more creative sleep aids.
Gratitude statement: I'm thankful I'm not a sadomasochist.