....or just plain tired.
Before we went to bed last night we vacuumed all the smoke detectors in the house. But at 1:12am (yeah, I checked the exact time) all the detectors went off. Without hesitation, and thank goodness it wasn't a real fire, we grabbed the vacuum and headed upstairs to the one smoke detector that is giving us trouble. Five seconds later it had stopped. Dave made it stop for good, though. He took the sucker right off the ceiling.
I don't do well with interrupted sleep. Did I mention I don't have kids?