Jimmy just seemed harmless, no matter Spike's dire warnings. Xander's wariness and caution had me on edge, and I could feel the shift in Jimmy when he started talking about living upstairs. His matter of fact "But if you have an accident... I'll get to move upstairs even sooner" was chilling. His torture and dusting were still a sad surprise, and Spike's brief eulogy was very sharp and strangely sweet. It sounds like Flavia has made a very large error in judgment.