Or "Why math is not my friend".
The project that I'm working on expands. I thought I had to reach a certain number, but when I consulted with the pattern again, I found that I had misremembered, and needed to go quite a bit further along.
To be precise, I suddenly had (yes, I did the math, which was a mistake) about 13,000 more stitches ahead of me in my project than I had anticipated.
I should never pick up a calculator when it relates to number of stitches (for just one portion of a project!) again. It's too scary.