I didn't want to post spoilers in case anyone wants to watch it but: there is a story in it that Einstein's son asked why he was so famous. He explained relativity in terms of a beetle crawling on a log. The beetle can only look down and thinks it is walking in a straight line. It can only experiences the curvature of the log in terms of gravitational force.
I THINK I'm the beetle... but the log is a manifold https://en.wikipedia.org/wiki/Manifold
I was looking at the Klein bottles in The Science Museum last year. I wish I'd looked harder:
"A mathematician named Klein
Thought the Möbius band was divine.
Said he: "If you glue
The edges of two,
You'll get a weird bottle like mine." - Leo Moser