More drama.
Got home from dinner last night and the CO alarm was screaming.
Dogs out, cats out, Mom out, called 911.
Fire brigade comes, two different monitors, and they find... nothing. Not a trace of CO in the house anywhere from basement to attic.
Seems that the battery was going low, and instead of making the 'chirp' like it should, it decided to get all dramatic and *expletive deleted*it.
At least Mom's new stove is working great.