The mouse almost won. And the fact of the matter is that I'm praying that it got in through the crappy, hole-ridden screens on my windows. If it didn't, then I may have to (a) tidy up my apt to the nth degree, and (b) invite the exterminator by for a nest hunt, neither of which keeps me up nights with eager anticipation.
Fortunately, I have logic on my side. I blocked off room by room, and then routed my new fuzzy friend into a box, tipped it over, and set him outside. Unfortunately for him, the feral cats come out around midnight. But then, he's small and dark, so it's probably a fairer contest than he had in here.
I can coexist with the spiders, as long as they leave me alone, but I've got no room in my life for the mice. You hear that, mice?

collin,
get the humane mouse trap from PETA.ORG.
your karma will thank you for it. so will i.
I thought my solution was pretty humane, as these things go. A little noise, a little box, and I set him loose outdoors. Of course, my boxes aren't quite as stylish...