I was just coming here to post about wanting to see an extended Event Horizon. But not the gore stuff - there was 30 minutes of additional footage that has been lost, so there's no possibility of a director's cut, but I remember thinking when watching the original that the story had obviously been cut to ribbons. The most obvious bad edit was that Sam Neill is just suddenly nuts between one scene and the next, pretty much out of absolutely nowhere - his experiences to that point in the film wouldn't have pushed him over the edge in such a bizarre way. There must have originally been some interesting connective tissue there. Paul WS Anderson has said that they only had 4 weeks to edit the movie because it was pushed up due to Titanic being delayed. He reacted to a test screening where the movie was judged far too long, by chopping it to pieces in a panic because they simply had no capacity to edit the film to the pacing they would have come up with if they had more time. Unfortunately we will never get to see what it could have been.