Originally Posted by Kilgore
You';re right that in Lawrence of Arabia, one of the characters falls on a detonator, but it isn't exactly a spoiler, and it doesn't really sum up the movie.
In Bridge on the River Kwai, the bridge is blown up when the guy who built it purposely falls on it. In that sense, it could be called a spoiler, and to my mind it definitely is a huge part of the film.
See, I believe the vast majority of movies are filled with potential spoilers throughout the length of the narrative, or ought to be if they are any good. It is a rare movie that has only one spoiler at the end toward which all previous scenes are directed and devoted to revealing with no narrative and character turns or surprises until then. How would anyone be kept interested for 2 hours until that last scene? In fact, I'm not sure I could name a movie of normal theatrical feature length that has only one potential spoiler in it, but I assume it might be a mystery of some kind.
Most movies are filled with potential spoilers. We aren't supposed to know beforehand that the boy who survived Lawrence's arduous and deadly trek across the desert to Cairo will be unintentionally blown up in the second half and anyone who mentions it during those earlier scenes is definitely spoiling something for the first time viewer. We aren't supposed to know beforehand that Jack Hawkins' character in Bridge will be unable to continue the sabotage mission he conceived and for which he is the commanding officer due to a wounded foot and anyone who mentions it during a screening in the earlier part of the movie is definitely spoiling something for the first time viewer. Yet, neither of those spoilers would be considered a summation of the movie. I think for a good portion of the movies that have already been named in this thread one could come up with more spoilers for other well known narrative and character turns taken in them. Maybe just my opinion, I suppose.