"Let's just keep moving." The vaguely familiar voice reached Sokka from far away; there were more important things to think about. But distantly he heard it murmur, "I hope Aang's okay."
The name made Sokka pause for a moment. He knew it was familiar. Aang. Huh.
But the mushroom – it could be his friend! This could be the experience of a lifetime – being friends with a mushroom!
I hope Aang's okay, too.
He paused again in confusion – but there was no way this thought could be more important than this mushroom-friend. Turning to his new friend, he dismissed the thought.
There was really not much to work with in this episode; I had to give it my best. Poor Sokka - hallucinating on the job.