Zombie Cliché Lookout:
Oh no, a zombie managed to get into the room with you! What do you do: find an exit, try to destroy it, hide, or start screaming and running around like an idiot, hoping your girlish screams will somehow confuse the monster? If you’re a quasi-comic relief, team coward, or the designated close-call character, chances are you’re going to choose this last option. Sure it’s not terribly dignified, and it certainly doesn’t seem like the best survival decision, but you’ve got to stay in character.
If you’re very, very lucky, someone else in the room will keep a cool head and come up with a plan to get everyone to safety. If not, well, let’s hope you enjoy being a shambling corpse.