Wow, my ineptitude paid off! I woke up late, and decided I'd better drive. As I drove, I thought I was being a lazy bum, because I could have made it by bike if I'd hurried up. But when I got to work, some people were moving the bike rack from outside to inside the secured back entrance, where I normally park. There was no way to get in there while they were working, so I would have had to park outside somewhere with my flimsy cable lock that is normally fine for inside of a locked building. My bike would have been stolen for sure, or at least messed with/stripped....