Hall of Infinite Doors

"I wanted to check the fusebox. Maybe it's only a tripped breaker. Do you have that flashlight?"

"That's a good idea," she agrees. "Here. It's over there in the basement."

You take the flashlight from her hands. She continues to look up at you. You take a slight breath and walk past her.

Then, without warning, you feel cold steel slice into your back. You let out a stifled grunt and drop to your knees--dead.