Select the "Convoy" encounter (Chapter 11) from the main menu. You will be getting dragged by a rope in this encounter. At the very beginning of the encounter, you can shoot vehicles with your pistol while being dragged. If you shoot them often enough, they will explode. Set the difficulty to Explorer and enable auto-aim under the control options to make this very easy. Destroy the first two cars, then restart the checkpoint and repeat this process until you get the "Hang Tough!" trophy. Note: Your progress resets each time you start an encounter. So if you quit the encounter before getting the trophy, you wil need to start over again. You must keep using the checkpoint restart until you get the trophy.