I'm working on my own feature film right now and it is a single location stage shoot. It is very very difficult to get much more than 50-60 pages out of this which I think with action will translate to about 65-70 minutes including credits. Now I'm not so arrogant as to expect a national release, but I just need a guideline to shoot for. I know I've seen some fairly short movies before and I think I would be happy to get 70 minutes out of this. I know Open Water seemed very short and it was about 80 minutes I think.