I've seen a few people on here ask question as to what exactly this is, how it works, and some of those questions were quite recent, so I'll try and explain this in easy terms. What you've got in there is a fire that's been starved of oxygen. They closed off the doors and windows, and the fire soon uses up whatever oxygen was in the air in there. For flames/combustion to occur you need fuel (the wood they have in there), energy (the heat of the fire) and oxygen. No oxygen means no flames - BUT the massive heat and smoke remain, and the smoke is building up. The interior is now at higher pressure than the outside atmosphere due to the heat and smoke build up, which you can see by that smoke venting through whatever cracks there are. You open a door and, as you can see in the video, all that heated gas pours out because there's a high pressure inside, remember? But at some point after you've opened that door, the pressure equalises. Oxygen from the outside can now enter, which is what he refers to when he says "now there's an opening". Once enough oxygen hits that atmosphere all those heated gasses inside can now combust - with the spectacular result you see here. What the instructor is teaching here is looking for and recognising the right "signals" in the smoke in order to realise this room they've simulated here is posing a backdraft risk. Pulsating, dirty white-ish smoke coming out of any small crack is a cardinal sign, often likened to cauliflower or jellyfish in appearance. I hope this helps!

Doesn't matter what country is what, firemen of all countries are practically heroes.

The sound of the pumping appliance ticking over brings back so many memories to this old firefighter 😁

3:19 when Santa falls in the chimney

Training, learned from bitter experience, that saves lives. Good instruction too.

So this is probably why firefighters put holes in a roof and smash out windows?

Read the smoke - it is telling you what is about to happen...and where you don't want to be. When they re-opened the door after letting the pressure build - Smoke is coming out and moving up at a rapid pace....but if you look at the bottom of the opening, you can see smoke going in. Then Whoooosh! Interesting setup they have. It worked very good for this demonstration.

That is so cool. Fire is such a beautiful, but deadly thing. Watching this backdraft is amazing how it just flashes over in an instant.

Meilleure vidéo expliquant ce phénomène. Merci 3:20

Maaaannn... I was expecting an explosion that would .... .... As i was typing that, an explosion happened. Lol.

I love the instructor

I think that the fence needs to be repositioned.😂😂

I remember this movie, I went to see it twice or even 3 times I was captivated by the backdraft scenes.

3:15 .. This is what we All came here to see. Also, his voice quality was really low, was hard to hear.

"It's a living thing Brian."

Beautiful Demonstration

that was a nice demonstration of a backdraft

@ 2:39 Look at the colour of the smoke it's green brown it is going to blow

3:18 HADOUKEN!!

That's exactly what happened to me when I was getting my charcoal grill ready to cook some steaks. I got the charcoals started and closed the lid thinking I had enough ventilation but nope! Came back outside to check if the charcoals were ready, opened the lid and I had a ball of fire in my face. My hair and eyebrows were smoking. All I seen was orange flames. My daughter was out there at the time when it happened laughing her ass off. 🤣🤣 I never did that again. That shit was scary as hell. Live and learn.😂😂😂

Wow! That was facinating, although also scary as heck

That was a sick vape trick bro.

i have new respect for the firefighters here, that building was loud and instantaneous: they never took their eyes off of it, i assume they were ready to hit the deck in a split second to avoid the possible blast

Slow Mo Guys anybody?

When yuo see the theory front of yuo materialize... é sempre bom voltar as aulas, aos treinos rsrsrsrsrs

Scary, but great training!

Fyi, when this happens in the scale of a whole burning building this has the power to destroy brick walls.

消防士のみなさん、日頃こんな危険をはらんだ現場で消火活動してんのか... 命懸けなのが改めて実感させられる。

Muito top! 👏👏👏👏👏

That was a good one.

The Dragon was just waiting... to breathe. The Dragon is very patient. Sooner or later, he will breathe. Respect the Dragon.

This is behaving just like a bitumen boiler fire when the lid is used to cover it. Same shape / type / colour of smoke. . . only much bigger. Whodathunk?

That’s the longest train I have ever heard, geez what was the noise in the background? Impressive backdraft

Wow. That’s intense

support your local firebrigade !

Mother in law found her laundry room on fire and opened the door- whammo- huge backdraft. They got out but lost the house.

merci c est beau

I heard of the movie called Backdraft but I never knew it was holy , How does a fireman know when it’s going to happen

Best experience

Slowmo guys did an episode on this, you should check it out

Wait for it...wait for it!😲

This was fucking cool 😂🔥🔥🔥

Never face a back draft without your hard hat

Just wow.

🤘😉👉Their a move to Backdraft that is good too✌😇👍🕊

Wooow! 👌😯

Alright, so in this video they show a backdraft in action, my only question is how do you "fix" the problem without causing a backdraft to happen? Or do you simply wait for the fire to die

빽드리프트 현상으로 건물 안에 발화가 극심한데 문을 다 밀폐시켜 연소 작용할 산소가 부족한 상태로 가스가 축적돼있다가 다시 공기를 주입하면서 축적된가스와 공기가 만나 폭발하는 현상

WHOOMP

That Backdraft. Same one with Slow mo channel

Whoa.

Wow

これは意図的に実験でやってるけど、もしも実際の家で起こったら怖いな

People run from danger ....heros run towards it

3:18 Katon Gokakyo no jutsu!

3:19 fus ro dah!

Caracter of fire

I was expecting a backdraft to occur as soon as that front "window" was opened, but it didn't happen until several seconds later. Can anyone explain the reason? Was outgoing smoke so thick that it was delaying incoming air getting in? Thanks!

3:19 looked like a jet engine

wow, that's... scary So after the backdraft, does the fire go out? or does the pressure building start again?

와.. 마지막 엄청나네!!!

Watch the final moment in slow motion.

Alguien sabe cómo se llama a esa reacción y porqué se ocurre?

How Big was the Dragon Inside

What happened on final? Someone explain to me please?

So you can create a back draft opening even opening the front door/window?

Why is the smoke white instead of black?

Me trying to control the temp on my smoker

Where do I get this class? Presumably, I’m a firefighter already and could benefit from this training. Thank you.

the container trying to blow Os lol

feh, still weaker than my fart

すべての扉を閉じて一時的に炎が消える所、”潜む”って感じで怖すぎる。

Por qué cambio el color del humo al cerrar las puertas

Parece um tiro de canhão nuuu

Backdraft kills the fire faster the firemen. This is like the hot house of my neighbor. They are high after

oh my.

Amazballs

Kurt russel ssssaaaavvveeee mmmeeeee

Where his helmet ? ?

FUS RO DAH

A spokesman for the South Wales Fire Brigade said… “fucking hell”… 😉😂

Raúl Jaramillo D 👍

Was that a scouse Asian 😂 awsome

3:15

Tanta contaminación solo para que salga esa explosión No mam.n

No harm for train service above this place?? lol.

That is fuckin scary.. wow

Fire Ball dhakare na

3:20 exactly what it looks like when the mother-in-law enters our home! 🤔🤔

Holy fucking fuck balls batman!

Fire is beautiful

日本じゃこんなラフにできぬ

Cool video, but was anybody else focusing more on wth dude was saying, rather than watching the fire? Dude sounds like he is from deep wood TN or back wood NO! Lmao!

와 무섭다...

えぇーーーーーーーー

А я думал рыбу коптят

is the Asian guy from Yorkshire or something

Can someone with an adult volume voice please try to explain.

2:37

3:18 Wow. Looked fake but it's real.