Science girl Actually nothing is moving here, its optical illusion

Explain the illusion

@gunsnrosesgirl3 The legs are moving on one of them

@gunsnrosesgirl3 Here it is without moving bottom right.

@gunsnrosesgirl3 Last one is definitely moving

@gunsnrosesgirl3 Is it???

@gunsnrosesgirl3 then why is it a video? it's clearly moving.

@gunsnrosesgirl3 That's a cool illusion but in the video - the chair is pulled

@gunsnrosesgirl3 Man, loved the Lemmings game.

@gunsnrosesgirl3 The guy running on the far right moves

@gunsnrosesgirl3 That i can see but the legs are moving even optically