Batteries, mother fucking batteries hit my ankle as they fell from the ceiling. I was browsing reddit when for some reason I felt like I should look up and as I did a pair of batteries just fell from the ceiling I had just momentarily seen and there was no explanation. Everyone was asleep and I was on my couch and I still can't figure out how that happened.
Edit: cool I never expected so many inbox replies yay me! The smoke detector was on the other side of the room near the kitchen and I later found the batteries belonged to my second remote that was missing them. The battery cover was still on too