If you mean like developing a protective layer of water over the eyes to fend off dust particles and potential danger from bugs, then I would have to say Dear Zachary: A Letter to a Son About His Father, that was a tough documentary to watch, I will say I was also very upset at the end of that one.

I don't tear up often watching movies but Hachi: A Dog's Tale made me weep like a little girl.

Tokyo Twilight.

I picked up the film at the library, searching for interesting-looking Japanese movies but I didn't expect it to affect me as much as it did. It was made in the 1950s but the themes are really universal. A delicate rendering of tragedy without solace :(

last one that had me bawling was Mary & Max. and before that Grave of Fireflies.

both are amazing, wonderful must-watch films.

Last night I got a little glassy eyed while watching Last Man on the Moon. Mostly due to feeling inspired by the bravery and ingenuity humans can bring when they are so focused on a goal.

Last time before that was during the scene in the Revenant when Glass finds his dead son. Specifically how he rests his head on his chest and tells him that he is his son and that he won't leave him, and the transition to that shot of the sun in the clouds. I'm a divorced father and have days where I feel like I lost my family (in a different way). The additional thought of losing my boy the way Glass did was wrenching. I didn't sob like a baby but I did have a couple of tears streaming down my cheek, which made my GF get excited and then start crying herself (mostly bc she saw a couple of tears in my eyes).

The Notebook. I had a chance to re-watch it on TV a few days ago and I forgot how gut wrenching the ending is!