Shoo it away.

You tap the window, but the cat doesn't move.

You open the door and say "shoo" in your most reasonable voice. The cat stands, stretches, and walks off the porch with the energy of someone who will remember this.

You close the door. Behind you, something goes tink.

The mirror in the hallway has a crack in it now. One long line, top to bottom. And as you step closer, the radio in the kitchen clicks on all by itself.

What do you do?