At the risk or suggesting that early encounters with corporal punishment left me scarred (and glad of it), there’s something slightly kinky about this product. “The StressVest has an adjustable pain penalty,” the brochure informs. “[It] allows the instructor to set the penalty to the appropriate level of the student being trained.” Please sir, can I have some more? Yes you can! Part of the police training system designed around the StressVest (or vice versa) involves setting the black box to shock the trainees at random, to test their ability to keep on keeping on when they’re being distracted by, say, a Taser . . .