Such is the excitement of my daily journey to work (roughly four miles), that if I'm not already miles away in thought, I'll play little games to pass the time. Hardly amazing stuff: counting people I recognize is the usual one.
Today I decided I would count all the security cameras I could see: this being on the bus journey and then my ten-or-fifteen minute walk through town to work. I was expecting that I would see maybe 25 or 30. I'm sure I didn't count them all, due to the limited viewpoint from the bus, the fact that the windows were steamed up, and I didn't want to crane my neck. There were 86.
On the journey home I noticed a few that I missed as well.
Update: On my way into town this afternoon (unencumbered by steam or other inhibiting factors) I decided to have another go, and reached 116 before I lost count (clearly I can only count up to 117).