Cutscene: You are running from the police in a city at night. You peek over a wall and see a train passing into a tunnel below. You jump down onto the roof of the train, enter it through a window, and pick up a pistol off the floor. You are wearing handcuffs.
Kill the enemies in the first carriage and proceed to the next one. Crouch under the broken rails. Kill the enemies in this carriage, then pick up the M1014, opening the door to the next carriage. Proceed for a quicktime event. Continue to the end of the carriage.
At the end of the carriage, follow the in-game prompts to climb out, jump across to the next carriage, and climb up onto the roof. Move forward, shooting the enemies at the sides of the train, duck under the oncoming debris, and jump down into the train again.
Proceed forwards, killing the enemies along the way, then open the door at the end of the carriage.
Cutscene: You go through the door and get caught. They ask you whether you are alone and then knock you out.