There was once a Far Side cartoon in which a black hole had opened in someone's living room and was sucking the furniture, people, pets, etc to the middle of the room.
It was a funny picture, but could it happen? If a black hole is created anytime you squeeze matter sufficiently and black holes act like other masses with respect to gravity, couldn't a black hole be created in a lab somehow and continue to exist there? If so, what would happen over time? Would the whole planet necessarily be drawn in, or might the hole be kept stable?