Dan felt that dread rolling off of Eddie, a warm and wet blanket that was stifling. It would be easy to turn around and run away - but then they would have done this for nothing, and Eddie would still be plagued by whatever was beyond that door.
He paused though, when Eddie took hold of his arm, not taking another step yet. I don't know, Dan answered honestly, but he supposed he could make some educated guesses. You both died in the same place. It's still stuck to you - now's the time to get rid of it for good. Shake off the excess.
It would need to be destroyed, whatever was there. Disintegrated. Broken up into pieces, not stuffed into a box like it was a hungry spirit - that worked sometimes, but then in other instances? Not the answer.