When you see a mirror for the first time
/r/StoppedWorking: Animals that have 'stopped working' - Pictures, Gifs, and Videos of animals (including humans and some exceptions of robots and machines) that have Stopped Working! - September 24, 2019 - 15:05
Attack!
/r/aww: A subreddit for cute and cuddly pictures - Things that make you go AWW! Like puppies, bunnies, babies, and so on... A place for really cute pictures and videos! - January 25, 2018 - 21:31
When you miss getting to one cat dimension but luckily find another.
/r/thecatdimension: The cat dimension - Whenever a cat freaks out, it runs off out of sight. Little do most people know that they actually escape to the cat dimension, which is a dimension that's always just out of sight of all humans and is contiguous with all of spacetime. Cats may travel through it at will, allowing them to go from one point to another seemingly instantly. This subreddit is dedicated to felines (and rarely, other animals) leaving for the cat dimension. - January 24, 2018 - 18:34