Well if I wasn't a cold, heartless bastard, i'd say the bit were Brookes gets "released" from prison in The Shawshank Redemption would be a particular scene that gets me.
Silent Running.....? I like the film, though I don't see it as a tear jerker for men. That said I was a little sad when the astronaut explained to the other robots that Huey / Duey / Luey was gone..... I also like the theme music to the film, even though it's a little sad...though I'm not sure that's the most appropriate adjective...
Add to that the scene when Arthur is reunited with Guinevere before he rides off to face Mordred. "I have often thought that here in the hereafter of our lives...."