As a combo knitter, I'm so used to reversing everything that I do it even when I don't have to. For the River Run on the right, I went straightaway to knit through the back loop on the knit two together. I realized immediately that this wasn't what the mock cable really called for, but decided to go with it anyway. I really like the sudden transition of the twisted stitches in the reversed mock cable. The Potluck Water on the right is done "by the book," which leads to a much smoother cable.