I know there are knitting Black Holes, where you knit and knit and knit and you measure your work and it's the same size as when it started. Are there spinning Black Holes? I spun for over an hour yesterday and I still have this puff of fiber to go. I could see the singles building up on the bobbin because I had to move the sliding hook thing (Majacrafts don't have stationary hooks, they have little moveable clip thingys - you can see it on the top flyer arm in the picture), but the fiber clump didn't seem to be getting any smaller. I went through several color changes in the singles, which would imply that I was getting somewhere along the roving, but I just can't tell when I look at the fiber I have left to spin.
It might take me all day to get through this, but I'm finishing bobbin 3 today!