I like the transparent combustion chambers of cylinder heads filmed in super slow motion.

Visual education is highly underated.

If you study how most mathematics was first understood by the original person, most times that person was thinking of visual geometry drawings.

This is true of Einstein.
True of Gibbs in thermodynamics.
True of Maxwell in light and radio waves.
True of Newton in shooting a cannon from a high mountain and adding gunpowder until the cannon ball went all the way around the earth.
Even true of Gaileo with different mass balls of the same diameter rolling down ramps or running experiments inside a steadily moving ship versus on land.