Help me debunk what I just saw earlier today, possible ghost sighting in Maryland?

I was staying in the Dunes Manor in Ocean City this past weekend, and strangely enough, the lights in the bathroom of the room I was staying in started blinking as I was leaving for home. The lights never done anything like that before, and everything was in wonderful working order. I can't recommend the hotel highly enough, although I have heard that the hotel is supposedly haunted. I'd recommend the hotel to anyone staying in Ocean City. So can anyone can give me a reasonable or scientific explanation for why perfectly good lights would start flickering for a few seconds and then stop as I'm leaving?