Reuster, the adolescent red dragon who can fart fire, receives some training from his master Ewik.

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It was almost nighttime now, and Reuster was busy trying to figure out his flatulent power. He had a lot to think about. Why was it fire? Why did it smell so much? Why does it come out the back door? How come I'm the only dragon who can do this? Hundreds of questions were swarming in his red cranium, mostly those about what would happen to Glonhare should he set off a giant fiery stink-bomb.
Just then, the sound of massive wing beats announces the arrival of the elder dragon Ewik, the enormous and powerful green dragon. Also trainer for the younger dragons, and more recently a mentor for Reuster. Ewik knew Reuster would have some difficulty adjusting to being different, so he volunteered to watch over him. He lands in the forest and slaps his wings rapidly until tucking them behind him, staring down at the small red dragon. "Reuster, good evening," he says in his blustery voice. "How've you been, lad?"
"I haven't had another gas attack if that's what you're asking."
Ewik sits on his haunches, an absolutely massive mountain of scale, spikes and fire. He pokes a claw at Reuster's slightly bloated belly. "But you've certainly been eating a whole bunch. Did you fish out the whole lake today, boy?"
"I left one fish! But...I have been feeling bloated today..."
Ewik snorts some smoke. "That figures. Well, might as well practice your fire...slinging today," Ewik announces. "Even though it comes out of your youngling ass, we must still practice!"
But what if I go berserk like the other day? Even though it would be so radical if this forest burned down, I don't wanna be the cause of the destruction of Glonhare, especially because of my ass." said Reuster, wiggling his rump.
"That's why you need to learn to control it. You can't go berserk. Besides, it's a wet day today, after that big rain. We won't need to worry about burning the forest." Ewik says, getting up and swaying his thick, powerful tail. "Tell me, Reuster, do the other dragons your age pick on you?"
"Who isn't picked on? And you should know the answer, considering my condition. How would you feel if you couldn't breathe fire at my age yet?"
Ewik walks around Reuster with heavy footsteps in the mud. "I would feel pretty bad," Ewik says, and with sympathy in his voice. "That's why I have decided to be your mentor. I'll keep anyone from messing with you too badly, but I won't fight your battles, boy. I'll see you become a proud adult yet, even with your unusual body!"
The adolescent dragon smiled. "Thank you mentor. I'll be your most loyalist...loyal...uh, I'll learn what you teach me." he said, unable to form the sentence correctly.
Ewik shakes his head. Well, speaking wasn't too important. "Now, feel that fish churning in your belly? Consider that your fuel. I want you to focus a blast through those rows of trees without touching either of them. If we can get you to light a cone instead of those big arse-bombs you started out with, that'll be a step up."
"You want me to fart a fireball through those rows of trees without setting any of them on fire?”
Ewik nods. "That's what I said, boy! You hard of hearing? Get to work."
Reuster exhales and turns around, thinking of the fish churning in his gut. "Just feel the bubbles in my stomach...just feel the bubbles..." The adolescent dragon heard his belly growl loudly and he opened up his cloacae in order for nothing to block his fiery flatulence. The red dragon shut his eyes and groaned before it all came out. Like all farts, it sounded loud and cacophonous, like some odd kind of trumpet or horn. The fart stank like a dead cow's bowels, but it was something Ewik was growing used to. As he passed gas, a large stream of fire was expelled from his anus. And, like magic, all the fire went in-between the columns of trees, igniting nothing but oxygen.
Ewik laughed, watching the spectacle and feeling too proud to plug his nostrils. "That's the ticket, boy!" he says with a triumphant laugh. "It's all about focus. Try individual fireballs, now. The small ones."
"Hmm, well that shouldn't be--" Before Reuster could finish, his bowels grumbled again and he let out another rank ball of methane, hydrogen-sulfide, and flames. After he was done, he giggled sheepishly and looked at Ewik. "Sorry."
Ewik lifts one foreleg and pats the top of Reuster's butt. "No need for apology there. Hmm....a popular trick is to breathe fire in one end of a tunnel or log and have it spew out the other end. Why not try sitting on a log with a hole in it and see what happens?"
"If you say so master." The red dragon walked over to a brown, rotten log resting on the ground and walked over to the north end of it. He promptly turned around and planted his butt on the end, wiggling his rump as his stomach gurgled. He sighed gruffly before letting out a giant wave of flatulence and fire simultaneously, something like the stench of tar burning. The flames went very far too; almost ten feet or more.
Ewik nods approvingly. "Good going, boy. You've got the three basics down. Why don't you try airborne fire spewing now?" The elder dragon has to see THIS in action. His great tail sweeps across the ground and even knocks down a small tree.
"Hehe, I fart while flying all the time when I was a kid! Doing that now shouldn't be a problem!" Reuster spread his wings and took to the sky, flapping his wings very slowly and soaring through the air. However, air was also soaring through his bowels, which quickly made its way down to his anus. Without further delay, the red dragon passed gas. Naturally, a long stream of fire came out behind him. Reuster wasn't too dim-witted though; he flew high above the forest so the fire wouldn't start a giant forest fire.
"Good!" Ewik calls. He waits until Reuster is in front of him on the ground, sitting up tall and proud. "I think you've just about got it under control. I don't have any more to teach you...today, at least. It all just takes practice and intuition!"
"Thank you master...although I still haven't seen you in action. Mind showing the student what you know?"
Ewik grumbles. "Fine," he says after some thought. "But don't say I didn't warn you! Lucky for you I ate quite a bit earlier." The green dragon rubs a foreclaw over his gut, then promptly gets on all fours, sticking his enormous ass up high with his head low to the ground. His wings bat several times before settling. His face is close to Reuster. "Hope you're ready, boy," he grunts.
Reuster scoffed. "Oh please. No offense master, but some of your farts are stale."
Ewik bared his sharp teeth. "Yeah? Hnnnrrrgh!" Ewik's face contorts as if passing a boulder, eyes scrunched shut and teeth bared. His whole body shakes, as his stomach rumbles. Lifting his tail, the blast comes without warning. It nearly propels him forward, the force is so great. The sound is like an enormous wind storm, and the smell is of something ancient and unknowable. Ewik's claws dig into the ground as his head lifts slightly up. Clearly, this is taking a lot of effort.
Reuster could do nothing but plug his nose and dig his claws into the ground in order to keep himself from being blown away.
This goes on for at least a full minute, without any breaks. Ewik roars at some point, until everything starts to peter out and his tail starts to fan the odor. "Uuugh....that sort of hurt, but worth it," the huge elder dragon says. "You still alive, boy?"
"Ugh.....I think I'm gonna throw up....."
Ewik laughs loudly. "HAHAHAHA! Suck it up, boy. You'll be fine." He pokes Reuster's tail. "It's a good thing we had you perform before that, otherwise this whole forest would be ignited. Think the methane alone might stick around for a few days. They'll know who did it." Ewik sounds almost proud.
"Oh yeah...this is a stench NO ONE will forget."
"Right. Anyway boy, what say we get out of here? Next time we meet, I'll give you a present. Maybe a big juicy gryphon steak."
"It's a deal! I love gryphon steaks!!!"