There is one kilo of Semtex plastic explosive back there.

在我身後的是一公斤的塞姆汀 (Semtex) 塑膠炸藥。

This ought to look good.

這肯定會很精采。

Okay. That didn't look great on camera. Neither did I.

好吧。剛才拍起來沒有說很好看。我也不太上相。

The film industry has a lot of tricks to make the explosions in movies look like the audience expects them to: all fire and flame and devastation.

電影產業有許多花招來讓爆炸場景看起來更加符合觀眾的期待：充滿了火花和烈焰，留下滿地瘡痍。

So now, we've seen what an actual explosion looks like, let's see how Hollywood does it.

現在我們已經見識過真正的爆炸是什麼樣子了，讓我們來看看好萊塢是怎麼做的吧。

There are two parts to the trick, and the first is what you're actually blowing up.

好萊塢的花招分為兩個部分，第一部分是實際引爆的東西。

We've just blown up one kilo of Semtex 1A, which is a PETN based plastic explosive.

我們剛才引爆了一公斤的塞姆汀 1A 炸藥。這是一種以 PETN 為基底的塑膠炸藥。

Now that's real military explosive.

那可是實際運用在軍事上的炸藥。

So for a Hollywood effect, we don't actually use the Semtex, because it does a lot of damage. It's designed to do damage for its military purpose.

對於好萊塢效果來說，我們並不會使用到塞姆汀炸藥，因為它的破壞力太強了。它是被設計用來針對軍事上的破壞用途的。

We don't want that. We want something that looks nice but does the minimum amount of damage possible.

我們可不想破壞什麼。我們想要場面看起來漂亮，但對周圍實際上造成的破壞越少越好。

So what we're going to use is some detonating cord to burst a bag full of petrol, and that will be ignited as it goes out by an ignition charge off to one side.

所以我們會使用導爆索來引爆一袋汽油，接著利用旁邊的點火線來點燃飛散的汽油。

And we're going to do this in three pots called mortar pots.

我們接著會用上稱作臼罐的三個罐子。

And that will direct the fuel as it flies out.

它們會引導燃油向外飛散出去。

And then it gets ignited, and that produces a nice, big explosive effect.

接著燃油會被點燃，產生出一個壯觀、盛大的爆炸效果。

There are loads of flames and fire and dirty smoke.

創造出大量火焰和火花，還有骯髒的黑色煙霧。

We do that to just pointing towards the camera.

但我們會把爆炸的方向調整至鏡頭拍攝的方向。

We don't want to bother sending it backwards or to the sides, particularly.

更確切地說，我們可不想讓爆炸往後面或是旁邊發散出去。

We only want it where it's going to do the effect that we want.

我們只想要它呈現出我們期望中的效果就夠了。

For the three pots full of fuel, we're probably going to use less than 10 grams in each of them.

在放滿燃油的三個臼罐中，我們在每個臼罐中大概只需要用上少於十公克的炸藥就夠了。

The reason we're getting a bigger effect using less explosive is because of the fuel.

我們之所以能用更少量的炸藥來達到更大的爆炸效果，是因為燃油的緣故。

We're putting that in there because that will catch fire.

我們在這裡用上燃油的原因是因為他們很容易起火。

Big, big yellow flames, lots of dirty black smoke, because it's a mixture of kerosene, petrol, diesel, and any other muck I happen to have lying around.

它們會產生出壯觀的黃色火焰、一大堆黑漆漆的煙霧， 因為裡面的內容是煤油、汽油、柴油，還有我手邊有的隨便什麼東西的混和物。

Those were in plastic bags in front of the explosive charge.

它們被裝在塑膠袋後，放置在爆裂物的前方。

The explosive charge is just there to propel the fuel out, vaporize it, make a big cloud of it, which can then be ignited.

爆裂物會把燃油噴射出去、氣化它們後產生出一大朵燃油雲，接著再被點燃。

So the visual effect is from the cloud of fuel igniting, and the explosive is just used to create that cloud.

所以華麗的視覺效果其實是來自那朵燃油雲被點燃後的結果，而爆裂物只是用來創造出那朵雲而已。

This is detonating cord. It's a thin plastic tube with some fiber winding inside it, but, down the very center, it's powdered PETN, Pentaerythritol Tetranitrate, a high explosive.

這就是導爆索。它是一個裡面纏繞著一些纖維，外面包裹著薄薄一層塑膠的管子，而在管子的正中間有著 PETN，也就是季戊四醇四硝酸酯的粉末。這是一種高爆聚合物。

And when this stuff goes off, it will detonate along its length.

當它被點燃時，會沿著整條管子爆炸。

That's about six kilometers a second. So it's pretty powerful.

爆炸初速能達到每秒六公里。威力可說是頗為強大。

But what we're going to do for the Hollywood effect is to reel it up, and make like little flat pads of it.

但在好萊塢效果中我們會先把它纏繞起來，捲成一小片的形狀。

When that detonates, the blast from it will fracture the plastic bag and spread the fuel out and create our cloud of vapor that we want to ignite.

當它爆炸時，產生出的爆炸力道會撕破塑膠袋然後將燃油擴散出去，創造出一大朵我們想要點燃的燃油蒸氣雲。

The important thing to remember is when you're using things like detonators, or the high explosives in a mortar pot, you need to separate it from the actual steel pot.

在臼罐中使用引爆劑或是高爆炸藥時，有件必須謹記在心的事情，就是你得把它們跟臼罐本身分離。

Because the shock waves from the high explosive going off can actually travel into the steel, and actually peel bits of it off and create fragmentation.

因為高爆炸藥所產生的衝擊波可能會傳遞到金屬上，可能會將金屬炸碎並產生破片。

So you need to put a lump of foam between the explosive and the mortar pot to make sure that it doesn't break up and damage the actors you might have close by.

所以你得在炸藥與臼罐之間鋪上一層泡棉，確保臼罐不會損壞並傷害到站在附近的演員。

With all the explosives in place, the second trick is how you film it.

處理好爆裂物之後，第二部分則是拍攝的手法。

By moving the camera back and zooming in, you make it look like your actor is much, much closer to the explosion, and it means the whole frame is filled up while everyone's still at a safe distance.

藉由拉開攝影機的距離然後放大鏡頭，你能讓演員看起來更加接近爆炸，並且讓大家可以在拍攝場景的同時，維持安全距離。

Then, you shoot in slow motion.

然後，記得用慢動作拍攝。

You make the explosion seem even longer by shooting from multiple angles and repeating it several times, and use all the cinematic lens and color tricks you can to make it look... well, more cinematic.

你能藉由從不同角度拍攝並反覆播放場景，來讓爆炸看起來甚至更加漫長，並且用上各種用得上的電影濾鏡和色彩技巧來讓它看起來更... 嗯，更有戲劇張力。

And you tell your actor not to flinch.

然後告訴你的演員，不要被嚇著了。

Also, you hope he doesn't give a cheesy grin to camera.

還有，希望他不要對著鏡頭擺出一副詭異的笑容。

Like, we had one take, and what I did was...

我們只有一次機會，然後我剛才竟然...

I should—I should've done sort-of cold steel glare down the camera. I just had a grin on my face cause I'm firing a thing!

我應該－我應該要一臉冷酷地瞪著鏡頭看的。但是我竟然因為自己能按下爆炸按鈕而忍不住笑了出來！

Did that work?

看起來還行嗎？

I was looking this way.

我剛才朝著這邊看。

I really wanted to look at the explosion.

我真希望能盯著爆炸看。

Oh, there is... there is a lot on fire back there, isn't there. Wow.

噢，那裡... 那裡火勢挺旺的耶。哇。