The US air system is so well developed, so there is a new career -- ATC, who needs to determine the different orientations of the aircraft at different levels, command their speed, and clear the air system so that the aircraft can arrive on time. Because of a large number of aircraft and voyages, all kinds of aircraft are moving at high speed, a little carelessness may cause the two machines collide, so people who do this work have a huge pressure, just like Nick and Russell. Being an ATC need to be alert, quick at figures, focused, and also, good at speaking

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The film tells us that how do you think and how to guess the behavior of others is based on your own behavior and thinking pattern. In other words, when you are suspicious of others, at the same time, think about what you will do if you are standing in someone else's position. Sometimes people are easily confused by inner and external things and then lost themselves. The solution to the problem is that you must face it, just like Bill told Nick jump into the cold river to have a rebirth.