Anamorphic Illusions a.k.a. Perspective Trickery
Youtuber and illusion-maker PortraitPainter Pabst made our heads spin with his drawings of distorted perspective trickery. He even films the entire process of creating his illusions for our amusement. Maybe with some practice, you can try to draw your own anamorphic illusions so you can try and mess with your friends.