Maybe a couple years ago I came across a manufacturer that sold a complete haunted hallway. It had skeletons on either side that would lunge out plus heads hanging on tracks above that slid back and forth. I'm thinking the whole unit tilted back and forth while patrons walked on a catwalk down the middle. The unit was several thousand dollars. I believe Cedar Point has one of these in one of their haunted houses and I was hoping to see a picture of it again to be sure.