In the face of those disasters, we all need to do this, we need to examine our own existence, we need to think about the meaning of life, and we need to find the courage to face setbacks.
Look at The Matrix, Inception... I can't tell if their selling point is gorgeous stunts or peculiar ideas.
In contrast to this movie, the simplest plot, people can guess what will happen physically when they become smaller, but what really matters is the psychological change of the protagonist - he has been examining his own existence and thinking about the value of his existence and purpose.
So, he did not lose anything, but gained the truth of the whole universe.
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