Ghosts and the Supernatural

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It's almost October, boys and girls, and that means Halloween. What are your favorite QaF stories with supernatural elements? And no, I don't "Supernatural" the series--just your ordinary ghosts, goblins, and other things that go bump in the night.

Ghosts:
I already love Never Have, Never Will, a story in which Brian's loft is haunted by Michael's ghost.
I also loved a story in which Justin rents the loft only to meet ghost-Brian. Brian is in a coma, not dead, but I can't remember the title. (Update: It's Just Like Heaven.)
And, I know there's one in which Justin died when he was bashed and now haunts Brian. Again, I can't remember the title. (Update: It's Better Now.)
Any other ghost recs?

Irish Folklore:
I know I've read a few QaF fics inspired by Brian's Irish heritage in the direction of Irish folklore. Brian Kinney and the..., for example, is a clever "Brian encounters a leprechaun" tale.
What else can you recommend?

Others:
I see there is a tag here for vampires, and one for zombies, so you don't have to rec anything found under those tags. But if you have anything else to rec, I'll gladly take it!

Update: Several recs are in the comments, but we have all month to make recs before Halloween! Thanks!