Worst movie I ever saw was "Wing Commander".
I got tickets to a preview showing of this movie and some guy got up and talked before the movie. He was relaying data about what the Audience thought of the movie.
The movie went through and at the end he got up, looked at us, then hung his head and left the movie theater. Apparently he hadn't seen the movie yet either and saw the disgust on our faces ;-)
And for the record, I loved Transformers
