"Hey," Toph said softly, sitting down beside me. "You okay?"
"I'm fine, Toph." I glanced away.
"Look." She sighed. "I don't know what all happened tonight." She held up a hand when I opened my mouth to speak. "And I'm not going to ask you to tell me the whole thing. But I think you need to talk about it."
"Maybe you're right," I said. "I don't know what it is, exactly. It's just, I don't feel-- clean."
"Why?" she asked, leaning into her knees. "You didn't do anything."
"But I could have," I said in a louder voice, opening my arms and staring at my hands. "You didn't see the fight. I came this close to--" I gulped, and lowered my voice. "Killing Aang."
"That wasn't you, Sokka." Her voice was almost shaky, and I turned to look at her. Her eyes were closed, her brow creased. Like she could feel the horror with me. "You know if there was any way you could have stopped it, you would have."
"Instead, I was helpless," I said, and shivered. I found myself gazing at the moon. Just... wondering why.
---
Half hour shows usually don't have much time to explore anything beyond the main point. Sure, Katara had to deal with learning a corrupt form of bending, but what about those who were manipulated by it? Trauma everywhere!