There's almost certainly something else up there, but Ghost isn't going to pry. Instead he laughs, more at the question than anything, before leaning back against the railing. Hard to tell if it's that he's confident in it holding his weight or that he can catch himself if it can't; probably some from column A and some from column B.

My neural model is a guy who got a doctorate at 22. Technicalities and whiteboards are his idea of a fun party. Underneath it is a layer of 'traditional human ideas of taking the body out for a spin aren't all that interesting to me really,' but he's not saying that outright. And yes, Ghost is enough like his neural model that he's more curious about those technicalities than anything, but he also has the sense to keep that curiosity to himself, thanks. This is why you shouldn't leave neuroscientists unsupervised.

The tone there is very much 'this is why you shouldn't leave young children unsupervised,' with the accompanying thought of 'they'll put small objects in their mouths and choke' being instead 'they'll put alien matter in their brains and develop psychic powers.'