I never bought the conspiracy theories and always assumed Mann deliberately avoided a two-shot in the diner scene so the final shot of the film would have more impact.If they were both on set at the same time, then Michael Mann really blew an opportunity to let these two powerhouse actors react against one another in the same frame. Sorry, but I don't believe there was any good creative reason to shoot their only scene together entirely in over-the-shoulder shots. Doing so only serves to call attention to the fact that they don't really seem to be on set together. Any stand-in could serve as the "shoulder."