Instruct: Classify Amazon reviews into positive or negative sentiment
Query: a harrowing tour de force

This could be one of the greatest movies ever made that few people know about. Cornel Wilde does almost everything in it. It's a blend of Hollywood drama with national geographic scenery and realism. The lack of dialogue and its cinematic authenticity draw the viewer into empathizing with "man" as he flees for his life. It is spellbinding!