Stun mines were a signature defense of the desert settlement in 2033. Pomson and her men set up a perimeter of them around the settlement in the hopes that James Zanasiu Jr would attempt to flee the area and trigger one.
After he rescued Malte Kerzach, Malte convinced him to do just that and both were incapacitated. However, James, hid one unactivated mine in his coat and later used it like a grenade, stunning Pomson during their single-hand duel. ("CS:Signs of the Father")