You steer your boat towards the stream on the right. You follow it around one bend after another, noting that this stream follows a sharply serpentine path. After what seems like close to an hour, you round another hard turn in the stream to encounter another boat rowing towards you. Sitting upon it is... you. You stare at your doppleganger, and it stares back, sharing your expression of puzzlement and shock. You raise your right hand tentatively to wave. Your double copies your actions precisely, raising its right hand in tandum with you, waving back. You can attempt to talk to your double, attempt to paddle around your double, continue paddling straight ahead, or you can use your whistle or flashlight.