This thread was created for those of us who likes to take One Piece beyond FICTION and tried to find logic in every attack performed by one of the characters in the story, as of now we have characters that are able to create fire moves without possessing the Mera Mera No Mi (Sanji, [Kinemon](http://www.onepiecebay.net/manga/mangas/One Piece/672 - My Name is Kinemon!/17.jpg) and Luffy) or people that can create electric attacks without having the Goro Goro No Mi (Luffy, Law and McGuy “Thunder Lord”) and we have Vista who is able to create flowers with his swords (Hasn't been used on the Manga yet but I don't think Oda will allow something like this unless he doesn't plan on showing Vista again which is highly unlikely), we can try and find the closest explanation to this kind of attacks and try to figure it for our self how those attacks works.
To be fair I've seen too many people seeking an explanation for some attacks and I figured why not create a thread where we can discuss this kinds of thing and speculate about new attacks that we might be seen in a distance future.
This is my explanation for [REDHAWK](http://www.onepiecebay.net/manga/mangas/One Piece/644 - To Zero/18.png)
Redhawk is a fire based technique created by Luffy in which he stretches his arm using Gear 2 and Armament Haki “Hardening” leading this combination to create fire around his arm.
Here’s a GIF of the attack
First we need to understand what those techniques are in order to understand how REDHAWK works.
Gear 2 is a technique that can only be performed by a rubber person due by the increase of the blood flow that this requires, If this technique is used by a normal person it can tear your heart into pieces as said by Rob Lucci ( [CH.420 PAG.17](http://www.onepiecebay.net/manga/mangas/One Piece/420 - Buster Call/One_Piece-v44-020.png) ), Gear 2 allows Luffy to increase his speed to such an extent that he can hit the air, you can recognize this techniques by the first word “JET”.
Armament Haki is an ability that allows the user to bypass an elemental body or how we called a Logia user, this ability also grants you with the power to INCREASE the strength of your own attacks or DECREASE the damage that you can take from an enemy attack.
As I said above REDHAWK is a FIRE based attack that hasn't been explained yet, so I’ll do my best to make this explanation work
You need three thing to create fire
1. Fuel (blood-water)
2. Oxygen (Luffy’s Body)
3. Heat (steam)
NOTE: Luffy’s increase of his BLOOD flow is what creates the steam by evaporating the WATER inside his body
As you now know Gear 2 allows the user to increase the speed of his blood flow allowing this to increment his strength, but this technique creates a peculiar effect called “STEAM” and is visible every time Luffy uses it (steam can burn you), once Luffy starts his attack the first thing he do is “Stretch” his arm this will allow his blood flow to travel at a higher speed due to the amount of space it founds once the arm stretches, Second he applies “Gear 2” allowing his body to create the steam that will later on turn into fire and Third he covers his arm with “Armament Haki Hardening” allowing the steam in his arm to be covered by the now visible armor in which the steam [disappears](http://www.onepiecebay.net/manga/mangas/One Piece/644 - To Zero/18.png) for a couple of seconds, once the team is hot enough it burst into flames allowing Luffy to create this attack called REDHAWK.
In chapter 718 Luffy used an attack called “Hawk Rifle” an enhanced of his very own (Gomu Gomu NO Rifle) which doesn't catch on fire even though Gear 2 and Armament Haki is applied on it, but this sudden change can be explain it, REDHAWK is a steady move this allow his arm to be in an\ steady position so it can catch on fire while the HAWK RIFLE is a spinning move which doesn't allow his arm to catch on fire due to the spinning speed of the attack.
So what attack do you want an explanation for or better yet bring your own explanation to this thread and let's discuss it
PS: To be updated