In the scene where Forrest is on his boat and sails past Dan on the dock, he jumps off and swims to the dock where Dan is waiting. But the problem is that the boat is going to the right (Dan's view) and past Leutinant Dan. But then, later, Forrest says, "That's my boat," as it wrecks into the dock to the far left of Dan. This means that the boat would have to travel past Dan, and then make a left turn and circle back around then and come is straight and run right into that dock. This to me doesn't seem possible at all, unless some mysterious person is in control of the boat.