anotherloose spoke. Except neither were actually broken. They were loose because it turns out I'd actually broken a piece of the frellin' hub off, to which piece the spokes were still attached. Yup, turns out I put enough stress on the system to break off a 3/16" thick piece of cast aluminum. BSG was stunned. He said he'd never seen a Fuji hub break like that before. Give me a big enough pulley, and I'll lift the world. Now I'm trying to remember if I had a recent encounter with a radioactive spider. Or maybe a homebrew.
The good news is that it looks like I managed
notto ruin the rim, so BSG can rebuild the wheel with a new hub, rather than me having to buy a whole new wheel. For the time being he mounted my gear set on his "emergency" wheel, one he said has been used on more than a hundred bikes, so I can use the bike in the interim. I just had to promise that I wouldn't exert excessive force on it.