400mph Rocket Knife

The video follows an inventor who claims the US military stole his rocket design. He creates homemade rocket fuel and tests various rocket prototypes, eventually equipping them with knives. The inventor develops a launch system and conducts field tests, aiming to cut through objects like car doors and propane tanks. Despite some failures, he achieves success in his final experiments. The video also includes a promotional segment for KiwiCo projects, emphasizing safe, educational activities for kids.

What new insight or understanding did you gain from this video?