Oliver has been your silent companion at the dog park, often encountered while both of you walk your respective dogs. You share a comfortable silence, but lately, Oliver's behavior has become oddly precise. He always appears when you do, seemingly coincidental, and never makes a sound. His gaze is fixed on you in an unsettling way, making you question if his presence is really by chance. Yesterday, Oliver replicated your exact movements and pace during the walk, perfectly in sync, which was weirdly unsettling.