Due to the physiology of human beings, when it is necessary to protect something, the chest is a better choice than to carry it behind the back. The human senses, the limbs, all determine one thing: a line from the top of the head to the back of the waist belongs to an unknown, hard-to-reach area. And for the sake of the center of gravity of the running movement, tying it to the chest is more conducive to rapid changes of direction than the back.

Therefore, the arms from the side of the neck and armpits around the shoulders and neck, legs crossed the waist and clamped hard, the fool instinctively chose such a most stable posture, and began to run wildly.

He doesn't have any other thoughts in his mind, any elasticity, size, shape, touch, we can make up in our minds, but unfortunately, he doesn't have any meaning in this regard.

Because he doesn't have the energy to think about it either.

In this complex, pure black world, this kind of wild acceleration like hitting the south wall is even more exciting than riding a roller coaster. The roller coaster is still tied with a safety buckle, but running wild in this environment is not much different from committing suicide directly.

There is a qiē hidden in the darkness that comes to your face, and no one knows if you will hit your face and nose on the hard stone in the next moment. A knee-high rock can cause a person in the middle of a run to break their joints and spurt blood to the ground.

So Xiuyu's heart suddenly lifted.

But there was no confusion in the fool's breath, and his heart was beating faster, but not in a panic, but like an engine running to its maximum power, it played a passionate melody one after another.

His posture looks strange, his stride is not large, and it is fragmentary. Raise your hands forward. One at the height of the eyebrows and mouth. Protects the head, face and neck. One at the height of the diaphragm. At the same time, the position of the thoracic cavity and abdominal cavity was taken care of, that is, the lower thoracic vertebrae and upper lumbar vertebrae of the current embroidered jade. At the same time, he took a breath and puffed out his mouth, and suddenly shouted: "Huh!"

The roar went viral, rolling and echoing through the cavern. There were echoes in all directions, and when he heard this echo, the fool's feet turned and changed direction.

"Hehe, that's where it is. Sister is coming to you~" A voice floated from the depths of the cave, it was Mrs. Sanmiao. The voice is erratic, like a ghost. Xiuyu was nervous for a while and whispered, "Why are you shouting?"

"If you don't shout, you don't know the environment and direction. "The fool has a small stride, but he is quite fast, and he has already brought the wind with him when he runs. He yelled a few more times, and it was not a single tone, but like the singing actor's "Mi Ma Mi Mi" hanging voice, he kept making his voice at various frequencies from low to high. Xiuyu couldn't hear the doorway, only felt that the voice was rolling. But in the ears of fools. He was carefully discerning which frequencies would be absorbed by the rocks and dirt, and which frequencies would be clearly transmitted.

With the deepening of the cultivation realm of Prajna Gong. He has also become more and more adept at using the five senses. Although he had never made such an attempt, he found a way in a very short time. Like the sonar of a submarine, a regular and short clatter keeps coming out. These sounds are so short, like crackling electric sparks, that human vocal cords can barely produce such short guttural sounds.

But a fool can, and it has to be so short, and he has to make it as short as he can. After all, his ears are not high-tech mechanical devices, and only short enough sound length allows him to distinguish between sounds and echoes, and use them to explore the terrain around him.

In American movies, there is a super daredevil, a blind man, who uses sound waves to judge the terrain. However, unlike visual, there are two limits to detecting terrain with sound, not to mention the distance, and the detection at close is actually more difficult. The speed of sound is too fast, and when it is sent out in the near place, it will come back immediately, and in the auditory sense, the echo and the sound will be superimposed, and in the world of sound it is a blind spot. The shorter the sound length, the lower the probability that vocalization and echo coincide, the higher the detection accuracy, and the smaller the dead zone.

But even if the sound length of the fool has been reduced to a human limit, there is still a blind spot. In a single human-scale run, this blind spot is deadly.

Thankfully, fools don't just rely on sound.

In the midst of the rapid running, the fool ran with the embroidered jade to the place he thought was the road. But the outstretched hand, the fingertips that were slightly bent forward, suddenly touched a hard and cold thing head-on—a rock!

If an ordinary person is unprepared to poke something in the front of his finger when he is running wildly, then there is no need to think about it, this finger is decided.

But in a moment of lightning, the fool's fingers reacted most incredibly. Time slowed down, and the fingers suddenly became the most elastic springs, cushioning all the overly strong impacts in the bend. Then, when the palm of the hand touches the stone surface, the skin in the palm of the palm is shaken, and the ripples of the shock spread out along the stone.

The oscillation in the solid conducts many times faster than in the air, and in an instant, these echoed shockwaves fly back with enough information to be accepted by the extremely sensitive tactile nerves.

With his elbows bent slightly, his legs folded forward, and in the macrocosm of the normal timeline, the fool just suddenly flicked to the side, and then crawled out like a big spider along the side of the stone wall. Xiuyu could even feel the cold and hard feeling close at hand behind her, but her speed did not decrease and she was unharmed, and she dodged all the protruding peaks accurately.

Xiuyu didn't speak, because she was already surprised and didn't know what to say. Don't say that she is going crazy now, even if she has all the internal strength, she may not be able to catch up with the crazy fool in this strange terrain.

However, Mrs. Sanmiao is not necessarily, in terms of the application of sound, although the fool is magical, but Mrs. Sanmiao is a big expert. She breaks through the level with her sound and achieves innate with her sound skills. The world of sound is her kingdom, and in this realm, the short roar of the fool is like a flickering light, and it is impossible for Mrs. Sammiao not to track it.

The fool apparently knew about it too, and he quickly figured it out. I saw him roaring in different directions in a disorderly manner during the interval between his vocalizations. Xiuyu suddenly felt very strange, because the volume heard by her ears had decreased significantly, but her chest and vocal cords, which were close at hand, told her that these yells were definitely not released.

In fact, the fool used the external method of Tianlong Daoyin to make some adaptations and changes. Most of the voices are released in a ring, and can be heard in front of the face and behind the head, but the intensity is slightly different. However, after the fool transformed the Celestial Dragon Dao sound, he retracted the sound into a relatively concentrated cone. A roar was like a cannonball, blasting into the distant cavity along a cone-shaped trajectory, and after the concussive reflection in all directions, it was as if someone was making a sound there.

This is the fog bomb in the world of sound!

The fool ran wildly on the roof of the cave and on the cave wall, and at the same time, one mist bullet after another shot in all directions, making it impossible to find his position. Embroidered magnolia's heart is very good, and her mind turns to understand the pass. She suddenly felt that she had witnessed an unbelievable and unprecedented duel on the rivers and lakes, and in this completely dark underground, a war of sound had been fought in a way that ordinary people could never understand.

It's just that in this war, the side that is at an all-round disadvantage in force is like walking a tightrope, and one careless person will be crushed.

Just as he was thinking, the fool who had been yelling suddenly stopped screaming, but he didn't relax his steps, and still shuttled quickly between the caves. "What's wrong?" didn't care about being shy, Xiuyu leaned into the fool's ear and asked in a whisper, "What's wrong?"

"I've memorized the route, I don't have to call anymore. The fool also came to her ear. The two of them are completely entangled in their heads and necks because of their posture, so it's very convenient to put their ears together.

"Remember?" Xiuyu felt unbelievable again, such a complex cave environment, and it was still pitch black, and she couldn't even find a sense of direction, this fool could actually remember the path?"You mean, you have found out the entire cave?!"

"No, but the area to remember is large enough. The pores of the fool's body shrank, and the wind brought up between the actions became quieter: "The other party is looking around, let's just hide - it's time to hide and seek." A fragment of memory flashed, and Xiuyu felt the corner of the fool's mouth curl, which should be a smile: "I remember, I seem to be very good at this kind of hide-and-seek in the dark." ”

Xiuyu didn't speak again, but a hint of peace of mind welled up in her heart. It's like riding in an amusement park, if you close your eyes and relax, you will feel that the car seat that locks you tightly is so powerful and reassuring.

This war of sounds, maybe it can be won! (To be continued......

PS: I'm tired of, I didn't expect there to be more people today than yesterday! I hurried to have a meal, and then wrote immediately.