After regaining the control, run up the stairs.
You'll find yourself in the place, where the first fight with dinosaur took place. This time the square is covered with bushes, blocking the way. Pick up the skeleton's bone and fire it up from the container on the wall on the right (don't throw the bone, but stab it). Now, set fire on bushes without (stab again) - it'll destroy obstacles with ease.
Go through the passage, turn right and fallow Ann.
You'll find yourself in the place, where first Kong's sacrifice was standing. Go down the slope to see that the earlier bridge is now destroyed. Unfortunately, Ann will find the solution.
She'll return to the altar and climb the crane. It'll raise after a while and you'll see fire belching from 'towers' windows. It was natives' trap.