Sam glanced at Anna. He didn't want to leave her, but since the spirit was busy with Dean, he figured she'd be safe for now. Grabbing a gun from the other side of the room, he fired at the spirit and it disappeared. He ran over to Dean.
"You don't think I'm going to run while the son of a bitch is trying to kill you, do you?"
He pulled Dean to his feet and dragged him back to the room with Anna. Chase was nowhere to be seen, and he hoped she was out getting the gear they needed.
"Sam!" He heard her yell and he turned around in time to see her try to throw one of the bags his way before she got thrown backwards down the hall.
Sam quickly grabbed the bag, pulling out a gun as the spirit began to crawl up on Chase. He fired at it and it disappeared, or rather, seemed to, but instead re-appeared right behind him. He was thrown against the handrails of the stairs and he dropped the gun, it hitting the ground and sliding away. Sam quickly reached into the bag, pulling out a canister of salt, and threw some on the spirit, which made it disappear.
He ran down to the room that had Anna and Dean in it and poured the salt all around the two of them.
Turning, he ran back to Chase, scooping up the dropped gun on the way. "Chase." He said, "Let's finish this for good."
Sam grabbed her arm and pulled her up the stairs with him.

-----------------------

"You take this and crawl through first." He told her, handing her the gun. "I'll follow you."
Chase crawled through the small hole in the wall, taking the bag Sam passed to her and hurried over to the bones. As soon as she stepped into the room, pounding started on the walls, the curtains started to shake, and the whole place just went haywire.
Sam pulled himself through a moment later and as he came over holding the salt, the spirit appeared in the middle of the room, looking just a little pissed.
Sam quickly threw the salt unto the bones just as he was thrown backwards into the wardrobe, the doors slamming shut.
"Quick, Chase, burn the bones!" He called through to her, banging his hands on the locked doors.
With one hand Chase sprinkled the lighter fluid on the bones, and with the other reached for the lighter, trying to finish the job in a hurry. All the noises in the room seemed to go up a notch and then something grabbed Chase, tripping her. She fell forward, hitting her chin hard on the ground.
The lighter fell out of her hands, landing a few feet away. She felt something flip her unto her back and the spirit started to crawl up on her, its cold fingers reaching for her face. She reached backwards, fighting to grab the lighter. Her fingers were only a few feet away, crawling, reaching….. She almost had it, and then she was dragged away.