If a movie causes me to have a lump in my throat I usually end up crying. I cry a lot at movies, especially if they are true stories, and even if not. I try to tell myself "it's just a movie, it's just a movie" but usually that doesn't help.
A few that come to mind that I cried either during or at the end, "The Notebook" especially since my Dad had Alzheimer's too. "Step Mom", I think that was the one, where she was dying and wasn't going to be able to see her daughter get married. At the time my own daughter was engaged and I went to see the movie with her and her fiance and I just sat there blubbering throughout most of the movie.
A recent one, "Still Mine" with James Cromwell and Genevieve Bujold made me cry too.