I had to exchange a combat jacket once which was US being torn and unsightly due to jumping on a roll of barbed wire which had been thrown down a stair well during a CQB exercise. The rest of the section ran up by back to clear the upstairs and when finished they had to peel me off the wire. When I came to exchange it the QM sent me away and I had to get my housewife out and make good the numerous holes and rips be for he would exchange it!!