Lower deck is a type of episode, made famous by star trek. Normally the episode takes place on the bridge, with the captain and his officers steering the ship into battle, but in the episode "the lower decks" it showed, what the other people on the ship do, when stuff happens. MLP did that with "slice of life", and shows a monster attack from the perspective of the background ponies.



With your giant pony stories, or giantess stories in general, itd be easy to pull something like this off. Like, the ponies come to earth, to meet with some human abassadors, on top of a building, but instead of focusing on either the ponies or the ambassadors, the story focuses on the other people inside and around the building, that arent directly involved.



First, they ground starts to shake, as the ponies come closer, then a wall of fur, blocks the window, a gigantic eye peeks in, to see, if the human, they were supposed to meet is already there, and when shes told, that hes already on his way to the roof, she moves up, but her form still blocks the window, and while the humans in the office cant hear the human abassador, they can still clearly hear the ponies side of the conversation, but its all out of context, and the chapter is about, how the office workers talk to each other, about what snippets they pick up, and comments about the general situation, and since the ponies cant her them, theres no need for diplomacy.



It could also be about, some guys, doing preperations for the arival of the ponies, measuring the estimated area, that needs to be cleared for the arival (but if they havent seen other ponies besides twilight, and the meeting includes one of the other alicorns, especially celestia, their calculations might be slightly off. Or it could be set after the ponies have left, and its about the guys stuck with cleaning duty, talking about the impression the ponies made (including the literal impressions, this time not only from their hooves, but also from where theyve sat/layed down)