Twist Ending (spoilers obvs)
I really liked the movie. I thought the ending was pretty fucked up. In case any of you dummies (of which I see many on this movie's page, like "Cyguration") missed it, the kid murdered Benedict Cumberbatch intentionally
Him using gloves to handle the rope shows us that he is aware that it contains Anthrax spores. The line from the kid where he says "my dad thought I wasn't kind enough, that I was too strong" was foreshadowing
Benedict Cumberbatch's presence was causing his mother to become a deranged alcoholic. Things were only gonna get worse after she gave away the hides
The kid took matters into his own hands and gave Cumberbatch the tainted hides knowing that he'd be poisoned
I felt bad for Cumberbatch because by the end of the movie his character came across as the most intelligent and sensible one. But at least it was unexpected, so I give the movie a thumbs up