Charles nearly doesn't make it, his active mind fighting against the somnicin at first. It's not till he makes a half conscious effort to let it happen that he goes under, his hands sliding off of his temples and into his lap as he falls asleep.
The next moment, he's standing in the building with Arthur, dressed the same as he was in the real world. It's a curious sensation, it takes him a moment to remind himself this wasn't all real. It sure looked real enough, even to Charles who was no stranger to mental illusions. "Fascinating..." he says, looking up at the glass chandelier above them and back down at Arthur who was standing a few paces away from him. He approaches carefully, not sure of what to expect.