[Logically, it does make sense, Castiel's just hesitant about the whole thing for his own reasons. Mostly because it would be smart to practice, but he doesn't want to do so himself, and then feels foolish about it.]
[Private]
We tested that as well, in part. If the control is only partial, such a hand, the target could still control their own power. Presumably it wouldn't work if the control was complete, however.
Audio
[Logically, it does make sense, Castiel's just hesitant about the whole thing for his own reasons. Mostly because it would be smart to practice, but he doesn't want to do so himself, and then feels foolish about it.]
[Private]
We tested that as well, in part. If the control is only partial, such a hand, the target could still control their own power. Presumably it wouldn't work if the control was complete, however.
[He hadn't wanted to test it himself.]