Cam admires snake dollhouses, which is also not a waste of time.

Time continues to be not wasted until Sasuke's recovered from seal removal.

That only takes a few days, so.

Cam gets an email asking if he'd like to attend the surgery for implanting the Rinnegan.

Yup, he will be there.

So, at the appropriate time, will a Rinnegan.

The surgery doesn't have any immediate complications, though Sasuke's significantly more groggy coming out of it, and Karin doesn't want him opening the affected eye right away.

Cam can load him up on stationary forms of entertainment.

"Thanks," he mumbles.

"Anytime."

"Feels different than a Sharingan already."

"Oh? Different how?"

"Sharingan has - like, a screen but no input? This feels like it has a keyboard I can't currently touch."

"...ooh."

"Hopefully it'll be an intuitive type of keyboard."

"Hopefully. Does it have a screen too, or just..."

"I think so - obviously I haven't actually opened that eye yet..."

"Yeah, it makes sense it wouldn't all be obvious with an eyepatch on."

"Mhm."

He seems tired and drifting.

Cam leaves him be.

He'll start asking for mild drinks after a bit, once he's safe to swallow things.

Cam finds him savory beverages with plenty of the recommended macronutrients.

And eventually Karin clears him to go back to his apartment, to sleep off the surgery - she'll check him again in the morning.

The next morning, Sasuke emails Cam with:

Well, I can see. This is intensely strange. I think I want to play around with some of it; suggestions on safer ways to do that than walking to the middle of nowhere?

Which stuff do you want to play with? We could go back to the moon.

I think I have a better intuitive sense of the gravity, and that's probably safest and easiest to test on a non-Earth.

A me can meet you at the shuttle.

Thanks.

And he's there soon after.

And they can go to the moon! "What do you think you can do with gravity specifically?"