Don't follow you, Jim. There is a camera in this shot
http://www.youtube.com/watch?v=RJ0v5H3Uctw. That was the point. You can't film a reflection without a camera. The scene was touched up from "mid-Morpheus" down. You can really see the big split in the tie and the black sheet was converted to parts of the jacket.
The Truth? The truth is -- in post-production, the fast photoshop to paint in Morpheus' jacket and tie is a lot cheaper than refiliming the scene. I'm sure it seemed good enough for the theater, because the audiance will only look into the doorknobe for a second. The "truth" is that lots of "continuity" problems are always discussed by the movie "crew" in post-production.
Filming (like everything else) can never be perfect.
http://www.moviemistakes.com/best_visiblecrew.php. There are usually lots of "takes" for each scene that goes into a movie. Every now and then (on the Hollywood set) there sometimes occurs a lucky scene and they get it right the first time. Even then, they go back and do it again, just in case. Usually a film crew films on average at least 2 hours of footage per minute of film in the theater. The post-production team has to decide which "continuity" problems will be worth the time to fix and which ones won't. Usually as long as it happens fast, they are not going to spend the money or pay all the actors millions of dollars to come back and reshoot a scene that didn't go just right. CGI today can fix just about anything, but it also can get expensive.
The truth is that I never worked on a Hollywood set, but one of my room mates once did and used to tell us about it.
There. Now doesn't that totally destroy the intrigue?