Until today, i used to think that films like Jodha Akbar is the longest film in the world. But i was ashtonished to see list of longest running films in the world. Modern Times Forever (Stora Enso Building, Helsinki) is a Danish movie which is 10 day long. If you dont believe me then check out this wikipedia page. So if you ever want to take revenge over someone, you can force them to watch this movie.