The Things They Carried Chapter 5, Enemies
One morning Lee Strunk and Dave Jensen get into a fight over a jackknife. Jensen punches Strunk in the face until he breaks his nose. Strunk has to be sent to the hospital for a few days. Jensen is terrified that Strunk will take revenge. He can never relax, and he becomes very paranoid. Then he breaks his own nose and goes to see Strunk. He asks him if things are even between them. Strunk agrees that they are, but later he laughs about it. He stole Jensen's jackknife--he deserved to have his nose broken!