I don't care what trauma they endured--it just wouldn't happen. And I am impressed with the yardage that she gets out of that last ball of yarn.
I will say that the scarf approached the length of my first scarf, which I never did cast off. When my grandmother taught me to knit when I was about 10, she did just that--she taught me the knit stitch. She did not teach me how to cast on, purl, or cast off. (My grandmother is not exactly known for her patience, so I am a bit surprised that she taught me to knit at all.) She bought me some size 13 needles (Susan Bates, of course), some squeaky chambray-colored acrylic yarn, and cast on a scarf for me. She then showed me how to make a knit stitch. I was to continue the scarf until it was "finished" and then she would cast it off for me. The only problem is that she decided that this scarf should be *gargantuan*. I had about 1000 yards of worsted wool, and by God I was going to use all of it. Remember that this was a scarf for me, and I was 10. I knit about 5 feet of scarf and asked her to cast it off. Not long enough. 6 feet. Still not long enough. 7 feet. Nope. 8 feet. Still no. I still had some yarn left, you see . . . . I finally just put it away and stopped asking. I still have it, on the needles, with the extra yarn. I doubt it would be short enough for a professional basketball player.