In the scene with Nedri before he meets the Spitter, he is trying to locate the dock to escape the hurricane or whatever. He sees a sign with an arrow pointing the way (the one he's about the knock over with his Jeep.) I haven't watched the movie in a while, but I remember that the first time you see this sign, it's pointing one way, and in the next shot when he gets closer it has rotated 90 degrees in some direction. So, don't worry, Nedri. The sign couldn't make up its mind BEFORE you hit it.