For the most part, Mitchell has kept himself content by tipping over furniture and wrecking the room some more. When Ivan sees him, he's looking dishevelled (and clothed, thankfully, although only an unbuttoned plaid shirt on his upper half).

Despite the disarray, there are moments when he feels the need to turn his back to all the shimmering shapes in the room and focus on the wall, or the corner of the skirting board. Right now is one of those moments, although it would be a mistake to think he had calmed down. It's simply a momentary lull.