Sunday: Endless hordes!!

The zombies are coming, the zombies are coming! Or [generic endless supply of cannon-fodder foes], if you prefer.

Where are you? Set the scene in your post. Anywhere, anywhen, as long as you're dealing with an attack by a seemingly inexhaustible supply of enemies. How do you respond, and can you get other characters to jump on in and help fight off the attack waves?