Anakin (who had, in the past twenty minutes or so, developed the distressing tendency to call herself Ani in her own head) leapt over her charging man-wolf girlfriend. The flip was probably very impressive to any spectators. It would have been even more impressive if Anakin had been more used to her different center of gravity, and as such had not lost her balance and fell on her ass.
Maybe Rahne's transformation had had an effect on Anakin, too. It became more and more easy to think of him as a dog and less like a girlfriend. She wasn't quite ready to start rubbing his belly, though.