Whether it is soaked fungus or cooked fungus, it contains a lot of water. The surface of Auricularia auricula is a tough membranous tissue, which is quite different from other ingredients in the dish. After microwave heating, the water inside the fungus quickly gasifies, and the volume increases, breaking the tough surface of the fungus, just like a plastic bag bursting, making a popping sound. Other ingredients, such as fried eggs, have many pores on the surface, and water vapor can easily escape; If the vegetables are cut into small pieces, or the strength is not enough, there will be no sonic boom. If you look closely, you can also find that the fungus was blown up, which also proves that the fungus exploded inside.