Starting around the 9 minute mark the fire Lucy starts spreads to a rope that crosses the water to the boat Addy is on. There is no reason for a rope to be there in the first place, nor would the fire burn that quickly on the rope. In addition the fire would not have spread to the top of the boat first, or spread as fast as it did. At one point the camera is outside at the front of the boat, and there not any remains of the rope left on the bow where it had been tied.