In this episode, Frank and Zhiyue slip into the quantum realm, where photons squeeze through two slits at once and electrons wiggle like noodles deciding which path to take. Lasers paint interference stripes across the room as the two test what happens when you watch a particle—and when you don’t. The classroom becomes a mini-lab of disappearing patterns, shy photons, and electrons that refuse to behave like they’re supposed to. Quantum chaos, served tiny and bright.