These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Nightmare Fuel: The "trunk" floor. The ghost of a woman peeks out of a trunk in the room, crawls out slowly, teleports to the front of the elevator, mumbles something incoherently, and mimes killing herself with a gun. Complete with blood.
There's also two floors: One with a bunch of red eyes staring at you, and a hand comes in and grabs a random elevator member. The other is a floor that makes your watch behave oddly, and also has the elevator disassemble and then reassemble, leaving a random elevator member as a pile of bones. In both cases, the character is likely to never return.
They Wasted a Perfectly Good Plot: The concept for this mod is unique and a perfect example of surrealist humor, but it comes with a price: a lack of modularity with regards to making your own floors. Players can't just download extra floors, for example, they can only download custom-modded versions of the Standard Level. And Standard Level With Custom Floors A B and C aren't compatable with Standard Level With Custom Floors X Y and Z.