Usopp wasn't so sure about the mental health of the person he was talking to, but wasn't going to point that out. After all, he probably came across as crazy to plenty of people, and he was just creative, that was all. It did sound like Kaiji had gone through some hard stuff even before showing up here, which would explain some of the scarring.

It didn't explain the grin, though. "... Okay, like what? I'm pretty much stumped still. And the people who're trying to calculate how many people traveling how many hours each night carrying what items and fighting what monsters get how far on full moons when it was a sunny day or whatever seem to be getting a lot of information, but I don't know if any of it really comes together to make sense." He'd skimmed some of those, but it all seemed just as random as the rest of this place.