I didn't vote 'cause my choice wasn't one of the options: I wouldn't yell or anything, but I'd grab the baseball bat from under my bed and go investigate. I'm ridiculously overconfident considering I'm 5'2" and out of shape, but I have a slight advantage over any intruders: I know the layout of my apartment (including where the cats tend to leave their toys) and I can see in the dark. I might be a short fat chick
but you'll never hear me coming. Nine times out of ten, though, it'll be my cats tearing around like their tails are on fire.
Intruders beware: my boyfriend and I collect swords, and know how to use them!