Most people would stay away from the castle when people start talking about a mysterious illness going around. But Spike always had his reasons for coming back at the wrong time.

He was just making a beeline for the elevator when he spotted Molotov. At first he didn't stop, but he paused as he passed by to glance around, looking for someone who would probably want to keep an eye on her. -- When he didn't see him, he changed his mind and decided to stick to his own business.