It looks chaotic. It sounds like it’s boiling. But the physics is beautifully precise. ❄️🔥 Liquid nitrogen (LN₂) sits at –196°C (–321°F). When you pour it onto ordinary dirt inside a container, several processes happen at the same time: 1️⃣ Flash Boiling (Phase Change) Dirt, air, and the container walls are far warmer than –196°C. Heat rapidly transfers into the LN₂, causing it to boil instantly. Liquid → Gas = ~700× expansion in volume That sudden expansion produces the dramatic fog and turbulence you see. ⸻ 2️⃣ Leidenfrost Effect Because the temperature difference is extreme, a thin layer of nitrogen gas forms between the liquid and the warm surface. This vapor cushion: • Insulates the remaining liquid • Makes it skitter and dance • Slows heat transfer slightly The same effect happens when water droplets dance on a hot pan — just at cryogenic temperatures instead of hot ones. ⸻ 3️⃣ Moisture Freezing & Soil Fracture Dirt contains: • Water • Air pockets • Organic material...