After team Sandstorm dispersed, Kyle went back into the tunnel.
'Hey, at least I get time to focus on learning more about funny ores,' Kyle thought.
'Gotta keep the positive vibes flowing. Imagine spending time moping around and lamenting your life. Hah, couldn't be me,' he thought as he remembered the time he had been on Earth.
The joke was that Kyle had constantly been moping around on Earth.
He had lamented his situation, but didn't do anything to change it.
He had been angry at his lack of funds, his non-existent social circle, the pressure his "colleagues" put him under, and so on.
As Kyle thought about his life back on Earth, he realized that he could have fixed almost all of these things.
It would just need a shit-ton of effort.
'Eh, nobody cares about Earth. Gotta get back to looking at magical stones.'
The tunnel had plenty of ore.