Alright, so here's an idea. The other day I was thinking about, what else, zombies. I was thinking about traps that could be set up to kill zombies. But I was trying to think of a trap that I wouldn't have to reset, or reload, or whatever. I wanted it to be there and just keep working. At first, of course, I just thought of a pit. That was boring. And then I realized that traps and stuff wouldn't do anything with the zombies. They get trapped, and then what? They just rot? Not anymore!
