It's a very emotional moment in the story. It shows the vulnerability of the characters, perhaps highlighting the disappointment or the pressure they are under during the Christmas season.
The One Piece manga is quite a bit ahead. It has been running for a long time and has many story arcs and developments that the anime hasn't caught up to yet.
The manga One Piece is usually a few chapters or arcs ahead of the anime. But this can change depending on the production schedule and story development.
In horror stories, the feeling of being trapped is quite terrifying. So in 'ef go ahead horror stories', if the characters are in a place they can't easily escape from, like an old, locked - down mansion, it adds to the horror. Also, the appearance of unexplainable and menacing creatures or entities that seem to defy the laws of nature can be very frightening.
I'm not sure specifically which 'ef go ahead horror stories' you mean. There could be various interpretations. Maybe it's related to a specific game or community with that name. Without more context, it's hard to share exact stories.