Fortunately, I did have a shotgun with some green plastic trim. It looked like a toy, but when I aimed it down into the mass of mice and fired—avoiding, as best I could, my feet—it took out a solid column of the little guys. "Ha, take that!"
But the dead and bloodied mice soon disappeared under the swarm. As you can imagine, trying to take out 100 cubic feet of vicious, biting mice with a shotgun was not particularly effective. One of them gnawed off a nipple, and another my left ear. Finally, I woke up.
I think this means that small and mundane problems can be overwhelming in vast quantities, especially if you are only equipped with tools to solve larger, singular problems. On the other hand, the message could be as simple as "take the stairs."