Sam suffers from mental health issues/problems.
Extremely severe.
At the dinner scene when the girl was playing a balloon and the man tells her to stop. She didn't listen, then he screamed at her and burst the balloon violently on the fit of rage. The girl was crying and yelling at him.
A man snaps at a young girl by popping her balloon due to her not listening and being brash and unfriendly. She then lashes out at him because he's angry because his wife is unfaithful to his brother.
A man has a violent/wild fit in one scene by smashing his wife's kitchen with a metal pipe and swearing, this may be very disturbing for some viewers.
This film is very emotional and tense throughout.
A man appears quite thin after returning home.
One character becomes very troubled and mentally unstable in the second half of the film, and starts distancing himself from his wife, daughters, and brother. The resulting atmosphere can be disturbing and unsettling for some.