If someone inflicts pain on someone else, they are said to be "putting them in the Hurt Locker". It is a colloquiallism, that means to cause someone physical or mental suffering. A metaphorical place you go when you are painfully unsuccessful in any competitive event.
Another similar phrase is, "a world of hurt" meaning that someone is in (or is going to be in) a great deal of inescapable physical, mental, or in a period of immense emotional suffering.
