M. Night Shyamalan's Glass had the potential to be something really special and in my opinion, for a myriad of reasons, it was a colossal disappointment.
And while I don't think there is one small change that can address all of my issues with Glass, I do believe there was a tiny choice that could have been made to the third act and that choice could have recontextualized the ending and given Glass something interesting to say about the genre.
