Jaspers' father crying after he acted extremely rude to him. It's obvious that he cares for Jaspers a lot and wants nothing more than for him to be happy, and having his son so upset with him is absolutely heartbreaking. Hell, just the whole subplot with Jaspers and his dad is a tearjerker.
From Cal's introduction:
Anyway, it's perfectly NORMAL to think of your dolls as having EMOTIONS. And even if it isn't, you really don't give a shit when you're ALONE.