After getting off the train Tori is trying to get them to be quiet so they can leave the city.
They are all running towards the gate with Tori being ahead because she wants to escape the place that killed her brother.
Tori was so far ahead that when she got shot all they saw was her flashlight hit the ground. Tobias yelled to split up but Tris needed light so she went to grab Tori's flashlight but stopped when she saw her.
After shooting someone, that was about to shoot her, for the first time since she shot her friend she took off running.
After she took off running she found a truck. The truck had Christina and Johanna . They ask were Tori was and Tris said she was dead.
The three of them go to look for the others. On the way there Tris thinks about Tobias and if he is safe. The other two girls convince her that Tobias can handle himself.