Chasm: The Rift

This is unmissable but I thought I'd give some advice to the battle, I noticed that after you destroy the Sphinx within seconds you get killed by an invisible force no matter how much health you have.
I found you have to run none stop for the exit, even touching the wall kills you so it's either timed or based on movement speed.
The route is through the left rib cage runnel, turn right, straight, right down next rib cage tunnel and then turn left.