Each rock was the size of a boulder! And when he stood over them in his spirit body form, nothing happened to these rocks as if a fly stood on them.
"That's weird…" he kept scratching them, infusing his spirit power at some point, attacking others to see what was different. And yet he found nothing at all, "What makes you special to be here? Huh? Can't you speak and tell me why?"
He didn't find anything even after jumping around for an hour. He could tell these were like the floating rocks in the outer world, without anything special about them.
Yet at some point, he started to get a hunch about something. Without warning he dashed high in the air, crossing hundreds of metres, before floating there for a few seconds. He then looked down at the entire hole, where lots of floating rocks were there.
And then he saw it!