The conversation this week:

Wow, I have a lot of yarn left. Look at the size of that ball. I’m sure I can get one more 16 row repeat done before I start the edging.
Are you sure? Right now you have 256 stitches, and 16 rows is at least 4096 stitches.
Yeah, but look at the size of that ball of yarn. No problem.
OK, this lace pattern is so much fun to knit; go for it.
Hey, I’m on row 11, and this yarn seems to be disappearing at a prodigious rate.
Um, maybe you should weigh the yarn before this next row, and see how much yarn you’re using per row.
OK, 21 grams; OK, now 18 grams. That’s 3 grams per row…
Um, that means you have enough for 6 rows, maybe. Which means the last 4 rows of the lace repeat, and, um, TWO rows of edging.
Carp.
And so, gentle reader, I took the whole thing off the needle, ripped out 12 rows, which is at least 3072 stitches, and got it all back on the needle.

This is the same picture, because I’m back at the same place. I took it after the big rip; I didn’t take one before because I didn’t really listen to that little voice, until it was too late. Sorry about the lighting; it was 1 a.m. But I had to do it then because I couldn’t go to bed knowing that it would be waiting for me in the morning.
Look at all those markers!
Onward.