Find a Way Out
Light your torch around the corner and burn the posts to the right and left of the cage, raising it, and then ignite the debris in the water. Climb the walkway and jump onto the cage to fill the container to the right with the burning debris. Return to the end of the walkway, then press Triangle/Y to push the debris out the other side, clearing the way. [250 XP]
As the place crumbles around you, run through the cavern and jump over the gaps and avoiding falling to your death or being crushed. When another man grabs Lara, wiggle the Left Analog to the left and right again to free Lara and prepare to tap Triangle/Y when the indicator is within the circle.
Move through the tunnel and leap over the gap, slipping off the ledge. Crawl up the slope by alternating L1/R1 [PS3], L2/R2 [PS4], or RT and LT slowly, but prepare to move the L Analog to the side when boulders come flying at you. [300 XP]