It is after he breaks from his roll that he realizes that she has started climbing higher, and then he realizes why - she is going to catch him, if he isn't careful and able to avoid.

(He wants to be caught, and then he will chase her, in the more traditional sense of things.)

It will take effort to try to avoid her this time, though! So he will change direction once she starts her dive, making move for now to at least put distance between them.