Shae hurls her spear...but misses. It returns to her as she begins retreating with the others.
One good thing that happens from her spear throw is that the giant's attention is diverted to the ceiling and to the changeling who is crawling across the rocky surface like a spider.
The giant swipes at the ceiling with a hard hit of its right hand, slapping Haklara, who grunts and flies to the ground near you with an "oomph" and injuring him. (He lands right where the W is in the map.)
Having been trapped for so long, the fire giant goes on a rampage. He begins by smashing the altar and two pillars at the end of the walkway and then starts walking south through the lava, his eyes on the retreating group and Haklara.
Haklara weakly pushes himself up, sees the approaching giant, and begins also heading south in your direction.
The party reaches room W8. Tahldar goes to W10 with his greater speed.