@JohnPhilpin I love this man’s soul. "Heat air in a tube and then squirt it out the back" explains jet propulsion in ~12 words, to nearly anybody. Maybe bongos should be a pre-req for physics. Anyone who uses their brain for more than icon matching and reverie will benefit from listening to and reading his work. There’s a video of him explaining (among other things) how energy that was (in) the sun, gets converted into trees, from which we get wood, and then fire—so enjoy some inter-galactic s’mores and watch it (1hr runtime).