9:15 a.m. UPDATE: Mr F got out of surgery at 4:30 or so this morning. He had two veins ruptured in his brain, and they were able to repair them both. He has talked a little and was able to give me a high five.
Thanks for all your kind thoughts. I'll continue to post as I can.
... if you read this. Mr F fell tonight, at about 8:30, and hit his head. He passed out and we took him to the ER. He has a subdural hematoma and went into surgery about midnight. It's 3 a.m. now and we're waiting for word on him.