Lydia, aka "Edgar Allan Poe's daughter," makes it clear to Barbara and Adam that she's "not afraid of sheets." I mean, until she realises that they don't have any feet because they're real ghosts and they're actually floating. Granted, Lydia was a little more into the occult than I was — and the Maitlands weren't exactly scary — but I still thought there was no reason for her to get closer to the supernatural if she didn't have to. If I was her, I would have faded out of there faster than Juno after a five-minute conversation.