Why I can't watch 6 hour movies...

Our family came over last night for movie night and we decided to watch Pride and Prejudice....the 6 hour one. I can hardly stay awake for a regular movie better yet a 6 hour one. Opening credits is about my limit typically. Steele will be laughing at a movie and looks over and I'm just conked out. Anyways, great movie I'm sure, I will just need to take 30 minute increments over the next few months to actually finish it. Kudoes to those of you who can stay up though!