You wake up screaming from this nightmare. Bad move. During the night a government crowd control toxic canister broke open and killed much of the population of the Co-op. Those who died returned as zombies and your screams draw them bursting into your room. You think its some dumb joke as they stagger to you groaning and leap onto the bed. But they start biting. Tearing. Ripping. Your screams are even louder now. As they chew you into shock and then into death/re-animation. another third eaten eater.
The End