Real faults store energy like a stretched rubber band — when stress gets too high, the rock snaps forward and releases that energy as seismic waves, the shaking we feel during an earthquake. You can model this by dragging a heavy brick along a wooden track using an elastic cord, pulling at a steady speed while a vibration sensor connected to a computer records each jolt on screen. The brick doesn’t slide smoothly; it jerks forward and stops over and over. Each recorded jolt represents a burst of energy released by sudden slippage, just like the elastic rebound that drives real fault movement.