Using a roll hemmer foot

I bought this skirt from - yes, you guessed it - a thrift store. I love the colors and the paisley. I chopped about 6 inches off it, so it wouldn't be dragging on the floor and so it would be more in style. I remembered perusing a blog the other day and found this posting. I can't seem to click on the exact posting, but if you scroll down a little you will see it. Anyway, she is using this hemming foot to make a rolled hem. I thought, hmm, I think I have one of those and have never used it. I tried it and it works!! It really works!!