24 February 438 A.D. 7.35 a.m

Method 1, "valve" ear pressure equalization, simple and effective, pinch the nose, gently puff the air in the chest cavity into the nose, which will put pressure on the throat, stimulate the opening of the eustachian tube, and the air will enter the middle ear cavity.

The second method is to close the vocal cords, pinch the nose, and then try to make a guttural sound like a "K". In doing so, the posterior third of the tongue (base of the tongue) is lifted upwards and the Adam's apple rolls, pressing air from the back of the larynx into the nasal cavity. During the successful process of this movement, the wings of the nose will bulge significantly, and the abdomen will relax and not exert force.

Method three, "swallowing" method.

When the human body performs the "swallowing" action, it is often able to open the Eustachian tube through the throat muscles, so this is also one of the more effective and balanced methods for ear pressure balancing.

So pinch your nose and swallow so that the muscles at the back of your larynx can pull the Eustachian tube apart, so that the air pressure is equalized.

However, the above three methods require pinching the nose with your hands, and the limbs of the two dogs, who are still sinking in the water at this time, are tied backwards.

If the second dog wants to solve the problem of ear pain, there is still an ultimate method of ear pressure balance - the method of opening the ear throat tube at will.

This method is to control the contraction of the muscles of the soft palate, and the upper muscles of the throat are used to open the Eustachian tube, tighten the muscles and push the jaw at the same time, similar to the action of the back of the throat when yawning, and similar to the action of moving the ear.

This method is difficult to describe and demonstrate, so it is difficult to practice.

But as the ultimate Dafa, its advantage is that you don't need to pinch your nose and free your hands. And because the muscles are actively opened, there is no need for gas assistance, so if you can master this method well, then the efficiency of ear pressure balance with this method is extremely high.

It is said that less than 30% of people can master this method, and most of them are born with it, and it is difficult to practice it.

This is due to the subtle structure of the ear that varies from person to person, and this method is difficult to acquire.

And Ergou is a person who is born with this kind of ultimate Dafa, otherwise how could he be called Adam's gene, the chosen son.

It can be said that this skill is already the instinctive reaction of the amnesiac Ergou at this time.

.....

In the backyard of the research university, in the snow-covered square, under the deep ice caves.

Coriander Murphy has already dived to the bottom of the water with the second dog in his arms, there is no light source under the water, it can be said that it is pitch black, except for the Murphy mecha, several tritium tubes emit green fluorescence.

"Okay, it's thirty meters underwater now, and the river in the mecha gladiatorial arena is also thirty meters deep.

This pool was built to simulate the environment of mecha gladiatorial fighting.

Drowning Training Now The Clock Starts! ”

Hanazawa parsley was in the mecha and said leisurely.

"Ni~Ma~Gollum~"

Ergou wanted to say why the timer had only started now, but as soon as he opened his mouth, the gas escaped from his mouth, so he had to shut up.

"Haha, talkative 007, can't you speak, right?

Let you usually love to talk back to me, this is your punishment! ”

Hanazawa Coriander's tone, at this time, sounded no longer as excited and crazy as just now, and even had a somewhat weak taste.

Time flies quickly, ten minutes underwater have passed, and for the lung capacity of the second dog, ten minutes of breath-holding can be said to be relatively easy.

For ordinary people, let alone holding their breath for ten minutes, a person with a weak physique would have been dying long ago in ice water at such a temperature.

In the face of danger, humanity's greatest enemy is often from its own fear.

At this time, the second dog is facing this situation, the pitch black underwater, the cold and biting water temperature, the limbs tied behind the back are incapacitated, and the extreme lack of oxygen that has been unable to breathe for more than ten minutes.

The worst thing is that Ergou doesn't know how long he has to go through the breath-holding time, and Hanazawa Coriander seems to be deliberately creating this terrifying atmosphere, and she hasn't said a word, and she can't attract his attention if she doesn't talk to Ergou.

How long is this damn training going to last? Did Kana Hanazawa fall asleep?

Isn't this apnea training? Why is it called damn drowning training?

Could it be that I was a guinea pig, drowning and dying, and then let Li Tianlin's old pervert rescue him?

What if I can't get it back? My Zuowei, Eighteenth Sister? My old father-in-law of the underground base? My National Guard?

I've run out of oxygen in my lungs, what should I do?

Ergou fell into endless blind guessing, endless denial, and endless fear, and the direct result was panic and excessive oxygen consumption.

When fifteen minutes passed, every second of Ergou was extremely long.

My mind is full of it, and I can't hold on!

At this time, Kana Hanazawa finally spoke.

"Whew~ It's a happy thing to be able to breathe freely~

007 ~ The effect of my medicine has passed, and my body is very weak now and needs sleep~

Yawn~I'll sleep for a while, you can finish the training by yourself, or save yourself~

Good morning ~ plus good afternoon ~ plus good night ~! ”

Hearing Hanazawa Coriander speak, Ergou's pupils instantly dilated excitedly, and he thought that his training was over and he was saved.

But Hanazawa Coriander's subsequent words directly made Ergou desperate, and his heart said.

"Nani? Isn't that for me to die? Is this for me to save myself? How do you escape with your limbs tied? ”

Under the threat of death, the two dogs began to frantically save themselves, or to say crazy struggles, under the water at a depth of 30 meters.

His purpose was nothing more than to break free, or brute force, to break through the high-strength cable ties that bound his limbs.

But helplessly, Hanazawa Coriander's binding position is very tricky, and it is all joint positions, and it can't exert force at all.

The torsos of the two dogs were bent backwards like a big shrimp.

At this time, he used all his strength to feed, and he couldn't break free from the binding, and even broke his mechanical prosthesis.

This move also greatly depletes the oxygen stored in the body of the two dogs.

At eighteen minutes, Ergou couldn't hold on anymore and swallowed several mouthfuls of water one after another.

"Be calm, you must be calm, how many times you have survived the difficulties, how can you fall in this kind of training? Isn't this capsizing in the gutter?

This damn Hanazawa coriander won't really fall asleep, will it? ”

Ergou kept telling himself to be calm, but his body had reached the critical point of bearing, and his instinct had begun to be uncontrollable.

Since you can't break free from the bondage, find a way to break free from the shackles of the coriander mecha, rely on your own buoyancy, can't you surface again, and then find a way to ventilate and be saved.

Coriander Murphy's mecha is one-handed around Ergou's waist, and at this time, Ergou can escape the control of the mecha as long as he finds a way to pan a distance to his right side in the water.

The desire to survive prompted Ergou to struggle back and forth in the water and twist his body, and every movement made the oxygen in his body disappear by a point, and also made him closer to surfacing to be saved.

Twenty minutes after the second dog entered the water, the arm of the mecha was still ten centimeters long, and the second dog whose body was bowed into a large shrimp was hung.

It is very difficult to move in the water with the limbs tied behind the back, and at this time Ergou's body has reached a critical point, and each of his struggles will spew out a large number of bubbles from his mouth and nose, and each struggle can only shorten the length of less than a centimeter.

As the minutes passed, Ergou had been underwater for twenty-five minutes, and his consciousness had begun to blur.

The length of the mecha arm hooking the second dog is already less than a centimeter, and the second dog can escape as long as he insists on twisting his body a few more times.

"Wow~Lulu~"

Ergou, who was in sight of victory, struggled with all his strength, and this move also made a large amount of gas squirt out from his mouth and nose in an instant.

A large amount of water was instantly poured into the mouth of the second dog, in the trachea and even into the lungs.

Just once, again, and I can be saved.

Ergou, whose consciousness has gradually blurred, is still trying to control his body with amazing perseverance.

But as time went on, he gradually lost control of his body.

"Woo wow wow, cough cough ~ grunt ~ "

Long-term breath-holding, lack of oxygen will make the body instinctively breathe, and the second dog can't resist the body's instinct, so it will let a lot of water enter the body.

The huge pain of the liquid entering the trachea and even the lungs will also prompt the body to instinctively cough violently, which will speed up the expulsion of gas from the body of the second dog.

Instead, a large amount of water entered his lungs.

Finally, after 26 minutes of excruciating, painful experience.

The remnants of the second dog's consciousness learned that through his own efforts, he had escaped the control of the Murphy mecha.

The two dogs, whose limbs were tied behind their backs, could finally float freely in the water relying on the power of nature.

The density of the human body is basically the same as that of water, but humans can breathe, which means that when the lungs are filled with air, they will naturally float on the surface of the water.

Finally saved, due to the extreme lack of oxygen, the second dog at this time may pass out at any time.

Ergou, who was out of the control of the mecha, found that he didn't float fast enough, or the tritium tube green fluorescent dot on the Murphy mecha next to him was not far away from him?

How so? Could it be that I'm exhaling too much? Is the density of the human body comparable to water? It must have been too much buoyancy to bring me to the surface!

By the way, my limbs or metal mechanical limbs?

At this speed, even if you can surface yourself, it is still an ice cave, what if you can't float up to the ice cave location?

It's over, it looks like I'm going to die here today!

"Woooo

Zovi...

"Woooo cough~cough~"

Eighteen sisters...

"Woooo cough~cough~grunt~"

I'm sorry everyone...

The only remaining hope of escape was shattered, and thousands of negative emotions quickly surrounded Ergou, and at this time, in his remaining trace of consciousness, there was only fear, only the guilt of leaving his beloved.

The blur of consciousness and the strong water pressure under thirty meters instantly allowed the liquid to invade Ergou's body, and also squeezed out the last trace of gas in his body.

Ergou, the last soldier of the National Guard, drowned in the backyard pool of Master Li Tianlin's research institute and fell into a complete coma.