Took me some rewatching to make out which dwarf was on which side when they were parted on in the stone giants battle. And I also noticed then, that there were some mix up, like once Kili was standing in front of Bofur and not Fili, also Kili helped someone take cover to the wall, which was not Dori, who is supposed to stand in front of him.

Also Im 100% sure now, that Thorin is wearing a ponytail/hairclip at the back of his head.

In order of walking:

Thorin's group (that was safe): Thorin, Gloin, Oin, Balin, Bifur, Nori, Dori, Kili

Fili's group (being ripped away): Fili, Bofur, Bilbo, Dwalin, Ori, Bombur

It was simply supposed to be a somewhat difficult walk through the mountains, along the rock wall. Paying attention were to step and carefully hold onto the wall. One wrong step and you'd fall into the depths of death. Never being found again unless the mountain decides to spit you out of its mouth.

Ending up in the middle of a Stone Giants Battle was surely not, what Fili had in mind when they started their way up into the mountains. They were huge, they were impossible to fight, they didn't care if some dwarves and a hobbit were standing in their midst, even less if they could die. Guess they aren't able to think or are just simply evil. If they just pop out and start battling, then the Giants wouldnt be known as legends but a big talk all around. So maybe they just choose the wrong time to come along? Either way he didn't like and wanted to get out of there as soon as possible.

The stones being tossed above their heads, smashing at the rock wall didn't help at all. When the mountain started to split, right beside his feet and the first thing he thought of was Kili.

"Kili."

"Kili! Gray my hand!"

"What's happening?", he heard his brother.

Then it was too late to get on the same side. Kili was moving away.

"Kili."

They stood there, looking at each other. The shocked and scared look on his brothers face was killing him. How could he ever think, that losing his brother was the worst. He'd be left alone, with his other half being gone. Literally his life ripped off of him. Not knowing what would hold meaning without his brother. There is no point in living when the person you took care of your whole life, you care more about than anyone else just disappeared and you couldn't do anything about it.

No. The worst would be to die and leave his brother behind. He couldn't even imagine how lost Kili would be. Since he was born, there had always been a Fili at his side. A big brother to look up to, that takes care of him, that tells him what to do and not to do, that protects him, but also plays pranks with him on other people. There was still his uncle and mother, but it wouldn't be the same.

'I can't even imagine someone else becoming more important than you, brother.'

'I'm perfectly fine with you.'

A sob escaped Fili before he was forced to hold on to the rock wall so he wouldn't fall off, when the Stone Giant tarted to move again. He looked away from the place Kili just had disappeared from, new resolve forming in his heart.

'There is no way I'm going to die and leave him behind, neither will I let him die. Even if I have to take apart those Stone Giants stone for stone to get to him and out of here, it will not stop me.'

One might say, people being protective become the strongest, though it's still not possible to fight a Stone Giant, but those thoughts at least helped Fili to keep going and not give up instantly.

He could barely make out that the other group managed to change places onto a part of the mountain that was not a Stone Giant - at least not one moving yet.

So it was only their group that was still in danger, on the knee of this Stone Giant. He was hit by a rock into his - presumably - his face and moved sideways. Their group moving along the others, exchanging shocked faces. Fili managed to lock eyes with his brother, the fear in his eyes was unbearable. But the time was too short to shout something at him or give a sign to calm him.

The next thing he remembered was moving forwards into a cliff on the mountain. He barely was able to make out his uncle's voice.

"No!"

"Nooooo!"

"No! Kiliiiiiiiiii!"

Fili snarled.

'Great uncle, you just mixed us up again. Kili is safe on your side.'

They both always were worried the most about the youngest, but Thorin got them mixed up all the time, worrying about Kili, no matter who actually was in danger. It's like he didn't even care about Fili. It stung a bit.

He was the next-to-be-heir after his uncle, but all his uncle cared about was Kili being safe. Fili wants that too of course, but his uncle not caring about him, was just so… so wrong. It has been troubling the older for some while. He'd never dare to say anything though.

Since they have been small, they tried to be accepted and approved of by their uncle. Fili had it always easier, copying the other dwarves. Kili always seemed to go his own way, starting to learn archery and on top he hardly grew any beard. Thorin still liked him just as much though. It has been meaningless to Fili in the last decades and had kind of given up on trying to improve his uncle much more than necessary.

He rather trained becoming stronger to protect his little baby brother. Since the day Kili was born, Fili swore to take care of him, protect him. And he didn't plan to fail so soon in his task. Not if he couldn't help it.

"It's alright, they're alive!", one of the dwarves' voices got to him and he opened his eyes to find himself and the others lying on the ground, a bit buried in stones, but alive and mostly unhurt except for small bruises and scratches. His uncle appeared around the corner and checked them over, counting if everyone was there.

Seeing his proud uncle letting a small relieved sigh go would make him chuckle, if not for the near-death experience he just went through.

While trying to find his footing and taking in the others around him, Fili barely noticed that Bilbo was hanging at the cliff and his uncle pulling him up, nearly falling himself and shouting at the Hobbit again. None of them had been very helpful on this trip yet, so he didn't understand why his uncle was letting it out on the Hobbit so much. He felt sorry for Bilbo.

Thorin and Dwalin went into the cave - which entry was by chance just where they had fallen - glancing at his nephew that was now helping Bombur to stand up. That was about all he offered Fili to make sure he was okay.

One by one the dwarves and Hobbit followed into the cave, even Bombur which Fili finally got up. That guy made awesome food, but maybe he should have little less of it.

He stretched and stopped suddenly. Kili didn't pass yet. No, he wouldn't without saying anything. Fili would know if he would have gone past him. He surely...

"Ki-"

"Fili, you okay?", Kili's dark hair appeared at the corner and as soon as he saw Fili ran up to him.

Fili let out a sigh and cupped his brothers face.

Kili's look went from relieved to worried, took Fili's head in both hands and brought their foreheads together while closing his eyes.

The older one followed suit and they stood in silence for some seconds.

"Thank you for having survived."

The other snarted.

"That should be my line. When that thing was moving towards the rock wall I was sure you'd be dead. My heart stopped for a moment."

Fili smiled, opening his eyes to look at his baby brother. Kili noticing the movement did the same.

"He called out for me again."

"He so did. Sometimes I think he's doing that on purpose."

They went silent again before breaking out in laughter.

"Come on in, lads. You'll end up more soaking wet than you already are.", came Bofur's voice from the cave entry.

They turned to him, nodded and followed him into the cave.

The moment they laid down in the cave, next to each other as close as they could, they started talking again. The others were still awake, some walking around, finding a better place to rest or simply being as far away as possible from the dwarves that tend to snore.

One might think, that they should run of stuff to talk about, but there was no end to it. Lately they've mostly been talking about their worries and so on and while this trip continues, there wouldn't be an end to them, for sure.

Their legs were tangled and their hands somewhere in between, grabbing for a bit of cloth from the other or trying to find a hand.

"Are you really okay?"

"You were in danger of being squashed to death, stop worrying about me, I was perfectly fine... except for you not being by my side."

"I just couldn't stand you being left behind. I'd hate to die and leave you all alone.", Fili exhaled and closed his eyes.

Kili watched his brothers face, before moving in to put a gentle kiss on his furrowed eyebrows.

"I'm alright. I'll do my best to survive and wait for you to come back. So that none of us has to be alone, ever."

Fili opened his eyes again and nodded with slightly teary eyes.

"I'll go wherever you will go, way up high or down low. I don't want to be apart again. I couldn't bear looking into mum's or uncle's face and telling them, that I was not able to protect my little brother."

Kili chuckled. "I can assure you, Mr. Dwarf, that you are doing your job perfectly. There is no better big brother and I'm sure your younger brother is very happy to have someone that looks after the mess he creates. You can't be around all 24/7 though, you need to rest so that you have full energy on the next day to take care of him. So at least when we're having time to lay down, use it to sleep and stop thinking about stupid things."

"Even though you are the baby brother and always bringing trouble upon us, you really know how to calm me down when I'm a mess of thoughts. You don't worry about the small stuff, I wish I could do that too."

"You are fine like that. Uncle wouldn't be able to handle two of my sort. It would be more fun though."

Fili poked his brother's ribs, but didn't say anything and closed his eyes again.

"Going to listen to your younger brother and rest a bit?"

The older one only hummed and Kili smiled at him, with a look that had a bit of sadness mixed in it. Knewing how much work he added to his brother's burdenes, didn't go unnoticed by him. He cuddled closer and thought about having a good night of rest.

Sleep they didn't get much, as the floor below them opened not so long after and they slid down a long stony channel.