The Canadian troops learned this during the Bosnian conflict. Some of the dead bodies were laid on top of bounding mines. The peacekeepers were instructed not to touch the bodies due to this reason.Never had much of a chance to use it. It was for searching bodies. However, we always tried to play as "real" as we could. You throw the meathook, just beyond the body and you pull it back onto it and let it snag it. If they move or make a noise when they feel the hook, they aren't dead. If they don't, you flip them over and make sure there are no surprises underneath. It was a trick the Oz soldiers first learnt in New Guinea. It saves lifes.