Well, actually, in that scenario, perhaps you should panic. Unless you own a copy of Surviving the Zombie Outbreak: The Official Zombie Survival Field Manual. Then you've probably got the situation well in hand.
Now, how, you might ask, does want write a manual for surviving a type of disaster that has never occurred before? Well, I'd imagine it involved lots of watching zombie movies. And perhaps watching what burnouts do as they stumble around the city trying to figure out how they're going to get their next fix.
You might also ask, in what manner is this manual "official?" Did some government entity sanction its creation? What it, in fact, sponsored by a group of zombie survivalists - or perhaps the zombies themselves?
My answer? Don't worry about it... you should go back to your video game and try to beat level 12 again... ignore the sounds of feet slowly shuffling across your floor...