If you have a cat, you're going to find this to be the story of your life, maybe. Or at least the story of your cat's life.
When cats hear a noise, but don't know where it's coming from, they want to find out. But when they can't find it, they become scaredy cats real quick.
This video is just one example. [I think it's better with the sound OFF.]
Cat Fights The Printer - video powered by Metacafe
I KNOW this is something my cat would do. Or probably even does all of the time. They're crazy, but that's why I love them.