Since Sally had been wondering the halls, she hadn't really been around to stop and watch the effects of a sting. But with Verity, man oh man, this was great. Sally grinned at the other girl as she spoke, and silently prayed for another bug to come along. That would make the effects last longer.
Since the other girl seemed to like the popping sound that the "stop" provided, Sally made a loud "POP" sound with her mouth to see what Verity would do. Oh this was far too amusing.