The reason: Lori's car needed coolant, so I put coolant in before she left for school.
No one is in the office yet; I think everyone else comes in at 10 too.
I was entertaining hopes of having some semi-idle time and writing some LiveJournal posts.
Then I realized that I had been well-prepared and started a run last night, and started the processing script in the car. So I was thinking that I would get in and I would get right to work on fresh results.
When I got in, I discovered that I'd run the wrong tree last night, so I won't have those fresh results for another three hours or so. I can't tell whether I'm happy or sad about this.
(Those results aren't expected to be that interesting, so they don't prevent me from being productive.)