@catsalad that makes my brain hurt 

@catsalad These sorts of illusions always fascinate me. It's such a good indicator for how faulty our hardware really is. We know the boxes can't be moving and yet no matter how hard we try to "actualize" that correction, our eyes still say "nope, they're moving!"

@catsalad @jenn

@catsalad I took a screenshot because I was convinced it was a gif