Impostor is a Watch floor where players stare at an empty hallway, or so we thought it was empty. The lights will go off and on at certain period of times. Along with the lights going out, a red impostor slowly creeps toward the elevator and eventually gets close to the point where it can kill players. Just stay in the back of the elevator and you are safe. I always knew red was the impostor, time to call an emergency meeting!
Fun Fact: You can temporarily explore the floor.