The blood in his system goes cold when the silence follows. He doesn't want to look to check and if he did look he can't do anything for him. He has to do what he promised, it sounds like. That's the only thing to do.

"Yes... you must go, Stiles." He doesn't realize he'd mumbled part of that to himself until his omen speaks to him. It's the final fire under him that he needs to get to his feet and run to the door, fox omen at his heels. He doesn't look back, but calls over his shoulder, "If you can s-still hear me, hang on."