When working the flank, a dog often goes from running very hard to a more easy going pace. She adjusts her pace to match you or to read the situation. We call this momentary change in gait Pace.
Pace is a great behavior to mark and reinforce, as it is thoughtful, methodical, cooperative movement. Pace is a sign of teamwork and connection.
You can mark and reinforce Pace and leverage that thoughtful teamwork and connection into a big leap.