Monty Python talks about this…

Obviously so, In the comic book and the video game as well, thats why its so good. But I do think that they're plotting to have the walkers sneak up on us and really cause a lot of destruction. You can't underestimate them or they'll get you. Can't let your guard down, with humans and walkers alike.

Epinephrine is adrenaline, which only means that the doctor is (again) getting Beth to kill for him, and this time its Carol. After all, he's done it before, and adrenaline certainly WON'T help with lowering blood pressure. Maybe Dawn knew she would go to the doctor and would kill Carol for her, no one is on Beth's…