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.
YMMV: Runaway Brain
Nightmare Fuel: Just the commercials for the short alone could terrify the young generation of that time.
Character Rerailment: Before Epic Mickey, this short attempted to bring back Mickey's much more adventurous side, or at least reconcile the current Mickey's characterization with that of his old one.
Signature Scene: When Julius' brain is put into Mickey's body, we are treated to one of the creepiest depictions of Mickey Mouse, and easily the most iconic.