Time Reverse Movie (Pilot Study)

This is a pilot study of a project I am thinking about since a couple of years. The idea is to make a movie with two persons interacting, but one of the persons moves backwards in time. If you play the movie, one person will behave in a normal way, and the other person will act backwards. If you play the movie in reverse direction, then the person that acted normal before will act backwards, and the other person will act in a normal way. The movie should make as much as sense as possible for both perspectives.

Besides some technical and acting issues, the plot of such a movie seems to be the most difficult part. The persons should interact in a world with opposite causalities, which means, that if one person gives something to the other person, then the other person will not take it, but will also give it. Also, verbal communication is  not so easy, since both of the two persons have to talk with someone who speaks backwards. 

The movie above is a first result (2009/03) of this project, and it has a really bad sound quality. It was created within a few hours, and since I was not sure if the result works, I put some of the required work steps like audio editing aside.