Yes. The closing shot shows the top growing unstable and, in the instant before the screen cuts to black, you hear the grinding sound of the top beginning to topple. At every non-reality point in the film where the top is spinning, it does so with no destabilization. Of course, it's possible that someone replaced his top (he wasn't very careful about concealing it and, let's face it, it's not rocket science to realize that it just needs to topple to indicate reality), but that's a different story.