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 - While on the bus to heaven, one of the ghosts the narrator converses with nervously reveals that there is talk in hell that when the sun finally sets, "they" will come out.
The ending of the conversation between Sarah and Frank Smith. It involves swallowing.
Tear Jerker - The possessive mother's pleas are heart-wrenching, even if we aren't meant to side with her.
The Weird Al Effect - Lewis credits an American sci-fi story with inspiring the idea of impervious matter in heaven (the original story apparently involved a time traveler who went back in time and found "raindrops that would pierce like bullets and sandwiches no strength could bite," because nothing can change the past.) Unfortunately, he couldn't recall the name of the story or its author. Neither can anyone else.
Wangst - Common in Hell. Actually, it's also the reason why so many Ghosts get stuck there-they can't see past their own egos long enough to admit Heaven can help them.
Wild Mass Guessing / Fridge Brilliance: In the beginning of the story, there's a bus, which drives damned from Hell to Heaven if they wish. The bus is operated by unnamed driver. Later, in Heaven, George Mc Donald notes that only the God can go to Hell to save sinners. Now, who is this Driver?