Some films I watch to have a sense of closure. Like watching "Star Wars III: Revenge of the Sith" to complete the Star Wars series. Or watching Truffaut's "The 400 Blows" to finally see the oft-quoted last freeze-frame closeup of the young actor's face. Or watching "Gimme Shelter" because I can't foresee not watching the Hell Angels riot at the disastrous Rolling Stones concert in this lifetime.

I don't need to watch them obssessively and repeatedly, but I do need to watch them just that once. Because.