Old people crying.
That part in Wall-E where he goes back to "Factory" mode and totally forgets about EVE.
That part in the episode of Star Trek:Generations, when Data creates his daughter, LAL, and toward the end she's dying, and Data says he can't feel sad about her dying, or love her, so she says "Then I'll just have to feel enough, for the both of us." or something to that effect, and dies. So sad ;~;
The Avengers spoiler:
The look on Bruce Banner's face when his eyes meet Natasha's during the attack on their ship. The look of pain and remorse as he knows what he is about to do and can only hope she manages to get away in time and get help. The final moment before his concious is sucked in and locked away in a dark and cold place by the other guy that mercilessly takes over.
A few facts about Bruce Banner (The Hulk) from Marvel's own records (http://marvel.wikia.com/Hulk_%28Robert_Bruce_Banner%29):
- Watched his abusive, drunk father kill his own mother in a jealous rage due to the loving relationship between her and Bruce.
- Suffers from Dissociative Identity Disorder, which stems from the abuse he suffered as a child. These are a few major versions:
--> Bruce Banner, the genius emotionally repressed doctor
--> Savage Hulk, the mean green rage machine
--> Gray Hulk/Joe Fixit, the Las Vegas bouncer with an attitude
--> Mindless Hulk, Bruce's worst nightmare version
--> The Guilt Hulk, first created during his childhood
- Blamed himself after his wife and unborn child died due to radiation poisoning caused by being with him for so long.
- He has many times tried to end himself, both out of depression as well as trying to stop others from using him as a weapon.
Bruce Wayne can't hold a candle to this guy. He really does tug on my heart strings.