Cover the sides of the hallway with your hands and the animation speeds down, cover the middle and the animation speeds up.
In this list, you had the luxury of knowing the images and gifs are actually illusions. But can you imagine how many ways your brain is deceiving you every day without your knowledge? In fact, its likely that everything you've ever experienced is heavily distorted so you can process and understand what you perceive. Thanks for reading, and please pass this on to others!