They run through corridors, keeping as far ahead of the Dalek -- and the fighting, the shooting, the dying -- as they can. Rose is in the lead and she's the first into the stairwell, where she grasps the railings in a wild sort of relief.

"Stairs! 's more like it! It hasn't got legs, it's stuck!"

Then the American's in behind her and Adam, urging them up the stairs, telling them the Dalek's coming. They pause halfway and Rose watches with anticipation, and then almost triumph when the alien seems to stop -- defeated by a flight of stairs.

And then it floats.

Rose tries to convince the soldier to run with them, but she's determined to try and beat the Dalek, and there's nothing that'll change her mind. So they run again and leave her behind, looking back over their shoulders at the scream that follows.