Something that shouldn't be here. That might explain why you feel so...unsettled. Besides whatever was behind the Door of Secrets; Dan didn't open it. He figured it wasn't his business right now anyway - if it was giving him that same unsettled feeling that darkness did, he'd push more. But it wasn't - it was just those skeletons that all humans stuffed into their psychic closets.
He kept going, traveling along the hallway which seemed endless - but behind the doors were all Eddie's thoughts and memories, glimpses of them through the glass windows. Something told him to continue though, so he did - his steps were silent on the shiny floors, everything spic and span. The hallway went on and on - then, he thought he heard it.
It was - music, he thought. Haunting, distorted almost - a cotton candy cauldron and something creepy that skittered up and down his spine. The closer he got the more the door loomed into view - it was a gaping maw of a clown's mouth, the word FUNHOUSE spelled above in neon lights.