Yeah, that would be a mostly-decomposed mouse corpse, surrounded by mouse feces and I-don't-want-to-know-what-else.
You bet your sweet booty I screamed. Loudly. I made it up that half-flight of stairs in one leap, and that's no small feat for a chubby, huffy, nearing-middle-age Mommy.
I won't tell you what it took to get me back down there to take the picture, but it involved ingesting pills that made me feel all floaty and nice and even able to think about mice with only a little bit of shuddering and whimpering. This is SOOO not cute.
On the other hand, these folks have the right idea. If only their aim were better.
I think my plan at this point is to lay big ol' cinder blocks across the doorway to the storage room, with thick layers of mortar between them. The mouse vault can be sealed off from the rest of the house. I'll keep food storage items in the laundry room. The rodents can rest in peace and I can give the happy pills back to B.