I was trying to pry the cabinet with the hammer, which is why it's laying on the ground - but neither I nor my larger roommate were strong enough! The PVC idea is pretty clever, although I don't have anything like that around the house. I also thought of putting a large box in front, so she'll feel secure coming out. Argh!! Thanks for the ideas...

Right now we're trying to annoy her out, by banging on the cabinet (that made her peek out before). Luckily I'm a night-owl, so I won't be going to bed anytime soon.