Two actually. The first is a reaction show of Cass with no dialogue just a "snik" sound in the low left of the panel. The second panel has Cass standing with the batarang around her feet saying "hmm." The next panel is the one where Babs is looking at Cass. I think some of the confusion comes from Cass looking off at the horizon rather than looking at Babs. I think it's because she hasn't registered that Babs did this to her.