Honestly, whenever in a movie a father really loves his child and puts their life and/or needs ahead of his own in any small way I just break down and cry. The man who raised me was a brutal, selfish, psychotic veteran who suffered from mental illness and addiction - so when I see that stuff I always regress to a childlike vulnerability/selfishness and wonder why he never gave a damn and wonder if I'll ever have the ability to be a good father myself or even just a good person.
I still haven't finished watching Finding Nemo.