Video: Reddit user Stupot McDoodle made clever software that could turn any GIF into a flip book by turning the frames of a GIF into easy-to-put-together squares that could be printed on paper. It's a fun project -- I mean, turning a bit of the internet into a physical object is weird and silly, but what's even more fun is to turn that video of him flipping through the flip book of a GIF he made into a brand new GIF... so he could turn into another flip book.
So it ends up being, as he explains it, "a flip book of a GIF of me flipping through a GIF that I printed into a flip book." Total genius (that's easier to explain when you watch what happens rather than read what happens).
Here's the original flip book he made of a GIF:
And then here's the Inception-type, next level flip book he made of him flipping through the original flip book: