I step in the other room with my back against it. I can't can hear his response because the door close just as his mouth starts to open. I turn around and quickly examine my surroundings. It's a large room, lit with light blue cases. There's a door, identical to the one I just walked through, directly opposite to me with a clear window placed in the middle of it.

I put my left foot in front of me and a gas box is chucked at me from the left wall. I turn to face it, to see where the boxes come out off. As soon as I moved, another box was thrown at me, this time I saw where it came from. A small slot in the wall appeared long enough for a small cannon to aim and shot the plastic container at me and then closed and blended in with the wall, as if nothing happened.

The boxes start hissing and I jump In front of them before they explode. Two more are shot at me. I blink and the room turns a dark red. I try not breathe, but that just makes me light headed and makes my throat hurt even more. I stay still and no more boxes thrown. It must be motion censored. If I sprint to that door, I might make it out before the simulations start. Quickly, I charge towards the door. So many box fly in front and behind my body, skimming my face and grazing my arms. I think I'm about half way when a box hits the back of my knee. I fall over and for a second I can't breathe. My body overcompensates and I take a deep breath.

My lugs scream out in pain. All I can hear is the sound of about twenty box hissing and fizzing around me.

"It's quite simple, Tris. All you have to do is walk towards that door." Chloe's patronizing voice booms over the speaker in the right hand corner of the room.

A whimper comes from behind me. I follow the sound. The cry came from Tobias. He doesn't look hurt but there's tear falling down his face.

"What's wrong?"

"I don't want you to do this, Tris. It's not worth it, you'll die." He says while grabbing my hands.

"No, I have to do this." I push his hands away.

"No, you don't. You always think you have to take care of everyone. It's about time that someone took care of you."

He lifts me up and throws me over his shoulder. I punch him hard round his face.

"Let me down. You don't understand, if I don't get it, I will die too."

He stops walking for a second and puts me back on the floor.

He scans my face and crosses his arms, "You're lying."

"I'm swear I'm not."

"I don't believe you. You'd say anything to save your friends."

He grabs my wrists carelessly and pulls me towards the door I came through.

"You're a simulation."

"Of course I am, Tris just stop with the lies!" He shouts loudly.

"You came from abnegation, Tobias. You could never be this selfish. You wouldn't risk hundreds of lives because you believe that you can save my life instead."

The room shatters and I'm transport into reality again. No, this can't be happening. The room looks bigger and I can feel the iciness of cold metal the cold metal door behind me. The door I entered this room in. I'm back at the start.