My brain didn't deserve that.
Stop, You’re Hurting My Brain: An Analysis Of The Ames Window Illusion

This an incredibly long video of Youtuber Veritasium discussing and demonstrating the Ames rotating window illusion and how it illustrates how we don’t directly perceive external reality. What does that mean? No clue, but I do have a headache now so I guess I have this video to thank for that. You could have just put a pot over my head and banged with with a wooden spoon you know.