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 senior citizombies' yellow pupiless eyes are quite frightening.
Tear Jerker: Numbuh Zero purposefully broke the Recommissioning Module so that he could finish the most important mission in his life: being a good father to his son, Numbuh One.It isn't until the finale that he is recommissioned again to say goodbye to his son.