I have to say that Grand Canyon is one of the most affecting films I've ever seen. I've watched it several times now and I still feel as I did the first time; that this film, by itself, could make up the entire curriculum of a post-graduate course in film direction.
A long time ago film trailers used to promise, "It'll make you laugh, it'll make you cry." That's a very trite and shorthand method of describing what Grand Canyon does. It takes you to the best places in human experience and the next moment takes you to the gates of hell.
Much of the film is paced to cycle back and forth between people being close to happiness and the same people being close to horror. It's always a short step, too. Just to manage that swing with grace and without making it look false or exaggerated is directorial genius.
Spoiler (of sorts) coming up. After getting the audience used to rocking back and forth through the emotional spectrum, the film throws a curve with a sequence that doesn't go from good to bad and back but instead escalates from an ordinary marital spat, through an accidental self-inflicted knife wound that may or may not require stitches, to an earthquake that has the characters run from the house. In the moment of their relief, argument forgotten, cut finger forgotten, the earthquake survived, a neighbor woman calls out that her elderly husband has collapsed. The couple rushes to his aid. I cried when I saw this sequence. I cried every time I saw it. I'm crying now. It isn't sadness that does this to me. It's not a particularly sad sequence. What tears me up is that this few minutes of film was PERFECT. That's PERFECT! Astounding. (end of spoiler)
There's so much to say about Grand Canyon. It portrays relatively ordinary people experiencing epiphanies and it lets the viewer experience them vicariously. They aren't showy or overblown and there's no long pause to examine the moment carefully. The film moves on at the pace of life. Even when the characters do try to make sense of what has happened, they are uncertain of what to derive from their experience.
Grand Canyon is a very human film.

What is left of Planet Earth is populated by a few poor and starving rag-tag survivors. They must eat bugs and insects, or whatever, after a poison war, or something, has nearly wiped out all human civilization. In these dark times, one of the few people on Earth still able to live in comfort, we will call him the All Knowing Big Boss, has a great quest to prevent some secret spore seeds from being released into the air. It seems that the All Knowing Big Boss is the last person on Earth that knows that these spores even exist. The spores are located far away from any living soul, and they are highly protected by many layers of deadly defense systems.
The All Knowing Big Boss wants the secret spores to remain in their secret protected containers. So, he makes a plan to send in a macho action team to remove the spore containers from all of the protective systems and secret location. Sending people to the location of secret spores makes them no longer a secret. Sending people to disable all of the protective systems makes it possible for the spores to be easily released into the air. How about letting sleeping dogs lie?!
The one pleasant feature of ENCRYPT is the radiant and elegant Vivian Wu. As the unremarkable macho action team members drop off with mechanically paced predictable timing, engaging Vivian Wu's charm makes acceptable the plot idea of her old employer wanting her so much. She is an object of love, an object of desire -- a very believable concept!
Fans of Vivian Wu may want to check out an outstanding B-movie she is in from a couple years back called DINNER RUSH. DINNER RUSH is highly recommended. ENCRYPT is not.