spoilerHe tries walking for his estranged, newly connected daughter and in this huge climactic moment he's having a heart attack and then he just looks up and goes "UHH" and that's the end. That's it. Look up -> UHH -> end.
I think a better ending would be him spoilerhaving the heart attack
and then dying slowly in the hospital with some kind of heartfelt conversation with his daughter and then die.