This film is two films in one, and they both suck.

This story (an American copy of a 2014 German film, written and directed by the same bloke) about the waning years of an elderly gent with Alzheimer's and the damage he does to his family has two parts. In the first, he shoots at his granddaughter with a pistol, lights explosives at a crowded party, and sets fire to the kitchen and himself in what is filmed as comedy(!?).

In fact, director Til Schweizer is gaslighting us much in the same way the family does to the old man's daughter-in-law (his son's wife), because she is the only one who notices a problem with the madman's behaviour. Everyone else, however, including her own mother, acts as though his dangerous mistakes are simply charming personality quirks and that she's the insane one for wanting to protect her home and daughter.

The second half of the film is a road movie that is less obnoxious and revels in standard bad movie clichés, predictability, and WTFs as big as all outdoors. Or maybe the first half is so abominable, it hides how awful the second half is. Take my advice and don't try to find out.