Strange things happen when you rotate in 4 dimensions

I also recommend:

https://www.youtube.com/watch?v=0t4aKJuKP0Q - 4D Toys: a box of four-dimensional toys, and how objects bounce and roll in 4D

https://www.youtube.com/watch?v=S-yRYmdsnGs - What does VR reveal about the 4th dimension?