Batgirl was fairly sure they were out of sight of anyone at street level, but she supposed anyone who happened to be observing from a nearby apartment window might be able to see more.
So she held up a hand to the two of them. "Time out." She removed a backup mask from a hidden place in her costume -- there was always the danger of being unmasked in a fight, so it never hurt to be prepared -- and gave it to Doug. Rather than the typical Bat-eared cowl it turned out to be a simple ski-mask, because it was easier to store. "Wear," she told him. In hindsight, perhaps she should have given the mask to Doug before introducing him to Spoiler. The things that occurred to her when it was already to late....
Once her students were both masked, she decided to clarify what she expected the two of them to do. Pointing to Spoiler, she designated her, "Attacker. Street." Then she pointed to Doug. "Defender. Use what ...I taught. Restrain. Do not hurt."
Then to the two of them, she added, "after...." She swirled her index finger in a circular motion directed at the two of them, telling them to switch roles after the technique was completed.