I have vague memories, but this is what they are:
The family had celebrations when bad stuff happened.
There were a few brothers.
I THINK one brother gets killed or hit by a truck or something?
Thanks!

At the end of the movie they are having a celebration (seriously, they had cake and a party when something bad happened). I remember dancing and one of the brother's girlfriends was there. It wasn't weird or comedic; it was a quirky family, but sincere... not played for laughs.