WHEN THE SPRING SUDDENLY ROARED 🔥🌫️ Visitors were quietly circling the boardwalk at Grand Prismatic Spring when the surface began to churn harder than usual. At first it looked like normal steam drifting upward ... the kind tourists expect from one of the largest hot springs on Earth. Then the center of the pool pulsed. A deep rumble followed, and a powerful burst of superheated water and steam shot upward from the brilliant blue eye of the spring. The rising column twisted as it climbed, lit