Didn't see this around, felt like making it after that terrifying moments made me think of a movie that half fit, but fits here way better.
Here's my two starters, both are crazy sad:
Grave of the Fireflies
Dear Zachary (this is a documentary and it's on Netflix instant right now. It's really good, but it is also the hardest I've ever cried at a movie. This is not "if you cry then you're a wimp" stuff, it's "if you do not, you are some kind of monster" stuff)