Hee! Oh, totally - I can just see Voldemort and his Death Eaters: massed outside Hogwarts, waiting to launch their attack, when over the ramparts come a legion of flying robots, all screaming "EXPELLIARMUS! EXPELLIARMUS! EXPELLIARMUS!"

Thanks for a great pattern. It's easy to follow, and despite all the bobbles (grrr... bobbles) was quite fun to make. I knit when I commute and had all these people coming up to me on the subway, asking what I was making. I haven't the patience to sit down and figure out all the math-bits of a pattern like this, so major props to you!