Sandy betrayed herself by letting out a yelp when Peter spoke up and she fumbled her attempt at a stab instead hitting the dummy with her knuckles. That caused her to drop the knife and wave her hand in pain for a moment while the tingling passed.

When he made his joke she felt her cheeks burn and shrugged picking up the knife. "Yeah they um...yeah I guess not but it's their job right?" Should she feel bad about stabbing the hell out of these dummies.

Plus it probably wouldn't do to tell him she was imagining the faces of various people she knew not too long ago.