[ Tessa's reaction to Ruben's reaction is, for whatever reason, to pull the man away from whatever he's reacting to with intent to place herself between them, but halfway through the action she sees the twitching hand and stops to point an accusing finger at it. ]

Is that thing fucking moving by itself?! [ She doesn't wait for Ruben's response before hauling him back around to face the way they were going and resuming at a clip. ] I'm not gonna high-five it, I'm just gonna walk away and we're gonna find your leg and my ears and then we're gonna find some kind of intoxicating substance and imbibe a comfortable dosage of whatever it is.