This trap card says:
Play this card when a hero opens a door. Unless the hero rolls a blank on one power die, his turn immediately ends and you may place one stun token on him. If the hero player rolls a blank, this card has no effect.
Now, is the door open if the hero is stunned or not?
I always played that the door was open in any case, but a comment on the "tactical compendium" site made me wonder (they said something like "simply use another hero to open the door", which makes only sense if the door stayed closed).