Batgirl increased her stride, moving out but keeping Robin in sight. When spurred to action, her words mind took a backseat, letting everything come in naturally as her first language, movement. And she was, in the back of her mind, overcome with sense memory: playing hide and seek (or really, hide and ambush) as a child just like this with him (surely 'father' wasn't the right word), breathing silent, senses focused wholly on the environment. Waiting for him to spring.