Boil!

Almost instantly, everyone felt the temperature from such a distance.

Moreover, the fire raged all the way along the suspension bridge, directly contaminated the pants legs of the security personnel, and immediately made a crackling and popping sound.

"Help!"

Witnessing this scene with his own eyes, He Hongbo immediately became confused.

Immediately afterward, another security guard took off his shirt without saying a word, directly covering his companion's trouser leg, and it took a lot of effort to extinguish the fire.

Immediately after, everyone looked back and saw a scene that they would never forget.

I saw that the fire on the suspension bridge was still burning, and it took dozens of seconds before it was gradually extinguished.

Be quiet!

At the moment, the surroundings are quietly eerie.

No one expected that things would turn so quickly.

For a while, the netizens in the live broadcast room saw it most clearly, and they could even clearly see how the blazing flame appeared through the live broadcast screen.

In this strong visual impact, they were all scared silly.

"What the is going on?"

"I'm confused!"

"Didn't you say that phosphorus fire is a cold flame, how can it become a fire in the blink of an eye!"

"If this is burned, it can directly burn people to charcoal!"

"What the hell is going on, what was the updraft?!"

At this moment, all the netizens in the live broadcast room were so frightened that their faces turned pale, after all, no matter who saw that terrifying picture, it was estimated that this would be the reaction.

This so-called suspension bridge is terrifying!

However, the most incredible thing is, how did the fire come about?

Doesn't it mean that a phosphorus fire is a cold flame at zero degrees?

At this moment, Professor He Hongbo and the others were also stunned in place with ugly faces, only to feel a layer of white sweat coming out of their backs.

Especially the security guards who were on the bridge just now.

If Zhang Yingxue hadn't reminded him in time just now, he might have been burned to a charcoal by now.

He swallowed with palpitations.

At that moment, he suddenly noticed the torch in the hand of his companion.

"Extinguish it!"

Although he didn't know how the fire was formed, he was horrified when he remembered what had just happened.

After the torches were extinguished, everyone fell into a suspicious spot again.

What the hell is going on?

How did the originally harmless phosphorus fire turn into a fire that could burn everything in an instant?

"It's biogas!"

And at this moment, Zhang Yingxue suddenly spoke.

What?

Hearing her words, everyone hurriedly looked over.

At this time, Zhang Yingxue recalled with palpitations: "That's right, I remember when I was a child, my brother told me that phosphorus fire is indeed a cold flame at zero degrees, but under certain conditions, it can quickly transform into a high-temperature flame, and even produce an explosion!" ”

"For example, when I was a child, my brother and I passed by a farm, and the eggshells piled up outside formed a harmless phosphorus fire, and the carcasses of farmed animals accumulated for too long to form a large amount of biogas!"

"Once the biogas and phosphorus fire are dissolved, a fire can be formed!"

What?

And this kind of thing?

At this moment, everyone's faces were solemn.

"That's right!" At this time, Yang Shurou also nodded and said, "The moment he came up just now, I smelled that from the mountain stream below, there was a rising air circulating up. ”

"If I'm not mistaken, it definitely smells of biogas!"

That's right.

Yang Shurou had thought that this suspension bridge was full of strange things, and now she can confidently conclude that there is definitely a large amount of biogas stored under the mountain stream.

Hearing this, everyone also suddenly realized.

But what exactly is going on here?

Where does biogas come from?

At the same time, netizens in the live broadcast room didn't understand what was going on.

"What do you mean?"

"Biogas, what is biogas for?"

"There are a lot of doorways upstairs, you can't grasp it, let me grasp it! The so-called biogas is a high-concentration combustible gas, and many children in the news threw guns into the sewer and were blown up, because there was too much biogas in the sewer! ”

"That's right, although the phosphorus fire is a cold flame, once it comes into contact with the biogas, it will form a fire with a very high temperature!"

"It's a chemical reaction, and this kind of fire can even produce a strong explosion!"

Grunt!

After seeing the explanation of the great god in the live broadcast room, other netizens couldn't help but swallow their saliva.

Only then did they realize that the drawbridge was just a decoy, and that the real lethal was the methane gas stored under the mountain stream.

Phosphorus fires are not harmful to people, and they can also confuse people who enter the tomb into thinking that the so-called white phosphorus is only used as a measure to prevent the drawbridge from rotting.

As everyone knows, that's the second part of the fatal killing game!

When the phosphorus fire ignites, the people who enter the tomb think that it is just a preservative measure, so they will walk on the suspension bridge.

However, once the methane gas from below gushes up, it will form a violent explosion and flame after coming into contact with the phosphorus fire, and if the security personnel just took even one step slowly, it is estimated that they would have been burned to ashes by now.

But now the question is, where does all that biogas come from?

Thinking of the key point, the two security guards couldn't help but look towards several professionals.

"I see..."

At this time, Professor He Hongbo suddenly nodded with a serious face.

He finally understands now, no wonder Zhang Yingxue and the two always say that something is wrong.

Thinking of the key point, he looked at the bottomless mountain stream below, and guessed solemnly: "It seems that the real danger is below, it is really a terrifying method, this mechanism is even used in psychology." ”

"If I'm not mistaken, there could be a mass grave down here!"

What?

Mass grave?

Hearing his words, the eyes of both security personnel widened.

Although they have all undergone professional training, they have never seen anything like it.

But He Hongbo nodded.

Although he couldn't see the situation below, he dared to pat his chest and make a guarantee, and there was definitely a mountain of bones piled up below!

The bones were piled up together, and after years of decay, the biogas formed had been deposited underneath, so the mountain stream below was directly turned into a large biogas digester.

But this situation, except for Yang Shurou, still made it a little difficult for the people present to accept.

But if you think about it carefully, this possibility did exist during the Qin Dynasty.

"During the Qin Dynasty, it was true that so many people would die!"

Thinking of this, Professor Wang couldn't help but swallow and said, "If I'm not mistaken, the mass grave under this mountain stream is where the qi is provided..."

"After years of decay and sedimentation, it turned into a biogas digester underneath. And when the updraft lifts up the biogas, it will have a chemical reaction with the phosphorus fire! ”

At this moment, all the netizens in the live broadcast room were stunned.

Originally, they were shocked enough to see the sudden change in phosphorus fire, but now that they heard that there was a mass grave down there, how could netizens still calm down?

"Not kidding, right?"

"Mass graves? How many people must be buried here? ”

"Nothing is impossible! Qin Shi Huang was the first emperor of the ages, but he also killed many people on the way to unify the world. ”

"Yes! Just Bai Qi alone directly killed 400,000 soldiers of Zhao State! Moreover, Bai Qi was also buried here, and it makes sense that there is a mass grave here! ”

"Where do you think all the slaves who were sent to build the Great Wall are when they die?"