Fire alarms. Seamus hadn't considered that possibility, but he studied the candle carefully and it wasn't producing very much heat or smoke. If he could have been bothered, he would have figured out some kind of shield charm but it honestly didn't seem like it was going to be an issue.
As they rearranged themselves, Seamus did his best to wrap around Dean. It wasn't easy, especially given he was the shorter of the two of them by quite a way, but he could feel Dean shivering and he knew it wasn't cold enough in the room to merit that so he figured a little extra contact wouldn't be unappreciated. "Think you'll be alright tonight?" he asked, pillowing his cheek against Dean's upper arm. "Because you're not getting rid of me now, and if I'm going to be woken up by you bashing me around the head I'd like some warning." He was only kidding and he hoped Dean knew it. Seamus would never - had never - asked Dean to take the potion just for Seamus's sake. He didn't much like the idea of Dean suffering, but he'd always let him make the choice for himself.