"...what even are these things?" you ask, patting the rock.
He twitches as you do. "...my memories."
You jerk up into the air. "What?!"
"I touch them and I see the memory," he says, shrugging. "I don't know why it works that way. You can sit down. I feel it if you touch it, but I can ignore it if I know it's coming."
"...so can we destroy these if we're not careful?" you asks, setting down.
"Sure we can," he says. "New ones pop up after a while to replace them."
You nod, and silence falls for a moment. "...wait, you tested this?"
He gives you a sardonic look. "Wondering why?"
You wince. "No."