Wan 2.5 Preview The man squats in front of the crystals and begins to lightly tap them with a hammer. He taps each time a different crystal. He did exactly four taps, with an interval of 0.8 seconds. Each tap produces a different melodious sound. After the last tap, the sky suddenly illuminates with a red-orange glow. A red circle appears in the sky and quickly spreads out to the horizon, illuminating the clouds. At the same time, a loud, melodious steamship whistle is heard. Startled, the man falls to his butt and looks up.