The wood began to move

Conversation upon noticing that my coworker had a plant as big as me just hanging around her cube.

Angie: What’s up with the new plant?

Coworker: They’re trying to give me some extra privacy so they got me this plant.  Then it became this thing, so people keep coming and moving it around.

Angie: Ah, I thought maybe Birnam Wood was advancing on your cubicle.