A Mouse from the Sky

As I was waking up today, I got up to get some water because I was nursing a terrible hangover. As I was walking back, I noticed a strange piece of paper lying right near my open guitar case. As I moved my guitar case out of the way, I noticed that it was one of those sticky mouse traps with a mouse on it. I went and woke up my roommate (also suffering from a hangover) to come and have a look, and help me try to figure out what the hell happened. He assured me he didn't put the mouse in my room, and that he hadn't been using those type of traps. (I'm not exactly primed to the way in which things have been operating at my apartment since I've been away for quite a while traveling.)

So what the hell happened?

Well, the best guess is that it flew in from my open window (open because my building is always waaaaay too hot in the winter, so you have to crack a window to keep from sweating). But who the hell is throwing their mouse traps out the window of their apartment so that they can cascade down into mine?

Isn't there a better way to dispose of your moused sticky paper?

I'm not happy to be a surrogate garbage handler, especially when the garbage is still twitching.