Tony was slow to return that look, and even then only raised an eyebrow at the conspiracy it seemed that he was being drawn into. It wasn't like Wesker would still be there. On the other hand, he had been so immediately aggravated by Tony finding him, that Tony wouldn't be entirely surprised if he had rigged the place to stop anyone else from stumbling upon it. How this came out was, "That's probably the respectful tactic. Wouldn't want to disturb his work."