The laugh is good. That's always the key, isn't it? The kid is supposed to laugh. They're not laughing as much as perhaps they should, but that's fine. Frisk looks tired, plus they're in a strange new world. The script only helps so much in a place like this.

"whoa, hey now." He very carefully puts a hand on their shoulder, not wanting to startle them. "hey, it's okay. that's not what's happening here. this is...heh, to be honest? this is all kinda above my pay grade. but i can explain it. heck, they even have informational pamphlets here. it's pretty wild."

He had a feeling that Frisk knew about the Resets. He just couldn't know for certain until now--well, at least in this timeline. Point is, if Frisk can wrap their head around timelines and Resets, they can probably understand alternate dimensions.

Maybe.