I did see Lacy dance around a couple times. If he'd just cut and go, he'd get a couple yards as opposed to none or going backwards. Positive yardage, even if it's 1 or 2 yards, is better than none.
Starks used to dance...Alot. I haven't seen him do it since the beginning of last year. In Preseason this year, I can't remember him doing it at all. Maybe he fixed that, but old habits die hard.