a way of slowing down the flow of the discourse before something surprising or important. This slowing down disrupts the flow of the discourse. It has the pragmatic effect of attracting extra attention to the target of the forward-pointing reference. It would be simpler to skip the additional reference and get on with whatever it is you have to say. The extra reference serves to pique curiosity about the target, in the same way that a drum roll or other dramatic delay has the effect of building suspense