Strange draws in on himself on the cot, bringing his knees up so he can rest his chin on them. Yeah, he knows that feeling. He couldn't do anything when he was trapped by Nightshade and could barely do anything when trapped by Ignatius. Greatest magician of the age, everybody.

He does look up a bit when Rita mentions the reasons. "And what reasons are those?"

He's worried he knows the answer already: because he knows too much, because he's too powerful, because he'd be a dangerous ally. Things like that instead of what Strange is hoping Rita actually says.