Clara Oswin Oswald may be a computer genius, but her common sense leaves something to be desired.
In the next episode of Doctor Who, Journey to the Centre of the TARDIS, Clara will get lost within the labyrinthine corriders of the Doctor's big, blue, sexy, um ... box. Now maybe she assumes the TARDIS is a safe place. She's wrong. That's not what had us pulling our hair out, though. No, it's something else entirely. Take a look at the clip:
Clara is smart enough to reason out that a red flashing light means "bad." She even checks her logic aloud to make sure. Then she opens the door anyway!
We accept as a matter of course that no Companion will listen to rule one, "Don't wander off," but to resort to pushing the red, candy-like button? That is Ren & Stimpy behavior.
(via Doctor Who TV)