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They both saw the knife. They both lunged for it, and it skitted across the metal grating they were fighting on.

After several strikes back and forth, he got leverage and threw her away from the knife, and then he scrambled towards it.

He got a hold of it, only to then feel the lead pipe come down across his neck, as his vision filled with stars and pretty colors. The next pipe shot replaced both with pain.

The third never landed, as he managed to throw the knife upwards, missing her, but hitting the rope holding back the girder.