Theo was relieved that he hadn't managed to offend Charlie by his question as he hadn't wanted to imply that he thought Charlie was incapable, at least in the parts of his brain that were still aware enough to be socially awkward; they were depressing numerous. He stood firm, albeit a little gingerly, on the platform and watched Charlie begin to climb the stairs at first before looking down and cautiously voicing the word that would make the platform rise. He wobbled a bit as it moved but managed to keep his feet under him until the platform reached the top, his attention mostly on the way the magic worked and keeping his balance more than putting Charlie under study.
He felt exhausted by the time the platform got there, as though it had been using his energy to move, and he stumbled when he stepped off the platform, steadying himself with a hand against the wall, jumping a little at the use of Charlie's wand and not even energetic enough to berate himself for doing so yet again. He took a deep breath and seemed to gather himself again, stepping forward. "It's a nice piece of magic." he commented about the platform, trying to keep his mind on moving forward and not letting it get away with fading out.