Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

[EX Q]: I've never figured out why Bill Murray's character tries to chop down a tree in Moonrise Kingdom. Is he hoping it will fall on the house? Does he just want to destroy something?
[EX A]: Why does Bill Murray's character try to chop down the tree?

[EX Q]: In Interstellar, when Murph visits her brother and his wife, she notices that their son is coughing hard, and she offers to arrange a visit from a doctor for him. The brother and his wife refuse, however, even though she warns them their son will die otherwise.  Did it signify anything? I thought that maybe it signified that there is an anti-science movement because of the blight. The brother certainly seemed to dislike his father and sister's scientific pursuits.
[EX A]: Why did Murph's brother and his wife refuse a doctor for their son in Interstellar?

[EX Q]: I have watched many movies such as Sixth Sense, where there is a major twist that if known prior to watching the movie can potentially spoil the enjoyment of viewing. I tend not to watch this type of movies again, or certainly no more than once, and wondered if this is a common reaction.  Is there any evidence that would suggest that comparatively, this type of films, whilst they may do well at cinema, have relatively poor post-cinema sales (I am thinking of the ratio between box-office and DVD/BluRay sales). So, for any budding directors, is this the type of movie to shy away from?
[EX A]:
Is there any evidence of "Big Twist" movies having poor post-cinema sales?