"IROH!!"

The old firebender approached the campsite, cup in hand, and inspected the situation before him.
Sokka, the Water Tribe strategist, was having an unsuccessful stand-off with our campfire, which was being suddenly reduced to a small flame then blasting off into a wildfire that licked at the boy's garments.

"Yes, Sokka?"
He glowered, "The fire's broken! Fix it!"
The former general chose to ignore the concept of "fixing a broken fire" and focused his breath on the fire, which had diminished in size again. The fire would rise and fall in sync with his inhalation and exhalation, but that did not prevent it from blasting off out of control from time to time.

"I'm sorry, son," the man said, "There appears to be a stronger force influencing the flames."
"But you're the only powerful firebender around for miles!" Sokka exclaimed, not even bothering to count Zuko or Aang, who were both considerably far from becoming masters.
"Actually," Iroh continued, "There is someone else whose emotions might fuel this fire, young one."

Sokka's face scrunched up, "Well, what kind of emotions fuel a fire?"
Iroh stroked his beard, "Anger, traditionally, frustration, passion--"

"Hey, Sokka," Aang called, "have you seen Katara and Zuko? They were supposed to be back hours ago."

Sokka's features darkened.

"ZUKO!!"

Somewhere in the forest…

Katara lifted her head from the prince's chest and poked him awake.
"Zuko, did you hear something?"
He stroked her hair softly and coaxed her head back down, "No, why?"

"ZUKO!!!"

"Hey, wasn't that your--"
"I think we should go back now."