Fire:

Pippin, proud for remembering the word, could feel himself slowly metamorphotating. There was something burning through him, cleansing him until he was no hobbit anymore. No, he was-

"What's that, Pippin?" Frodo asked. Pippin looked up from his feet, startled.

"Whaddaya mean?" Frodo stared at him funny.

"What did you just say?" Sam prompted. Pippin felt slightly embarrassed, a hint of a blush creeping his cheeks. He hadn't said it out loud, had he?

"Something, then hobbit, I think," Frodo put in, distracting Pippin.

"Firehobbit," Merry said. He had heard his best friend. "Wha's that supposed to mean, Pip?" A grin stole onto Pippin's face.

"Oh, just that I'm no proper hobbit anymore, what with no breakfast and all this walking. Next you know, I'll be skinny! That would be weird. And then, just as long as I'm being skinny, I might as well be tall."

"That it the most idiotic thing I have ever heard in my life." Pippin wasn't listening to his friend, but caught a red apple that had been thrown over his shoulder.

"Eat then, Master Firehobbit," Aragorn said, eyes twinkling in a normally grave face. Pippin sunk his teeth into the apple with great gusto, waggling his eyebrows at Merry.

This is a(probably bad) attempt at humor and writing, but when I thought of fire, I thought of this. This story is part of the 100 drabble challenge, began by NirCele(as far as I know). You should go take a look at her profile page, maybe join the challenge too.