Take a zombie apocalypse for example

That''s right; I said z-o-m-b-i-e a-p-o-c-a-l-y-p-s-e. You may laugh now, but when it happens, you''ll be sorry! The alarm continues beeping my head, pounding furiously. I slammed my hand on the damn thing, missing the Snooze button, repeatedly slamming my hand on the damn clock, shutting it off. The house was quiet, but a little too quiet for any typical weekday morning. What could be the reason behind this?