In a viral simulation video, Zack D. Films detailed how a groundbreaking knife, known as the WASP injection CO2 knife, could help someone survive a shark attack. The knife features a CO2 canister hidden in its handle which, when triggered, sends freezing gas through the blade and into the shark.

This gas freezes and expands within the shark’s body, causing catastrophic internal damage that could make the shark explode from within. The simulation demonstrated the knife’s principle on ballistic gel, showing the rapid expansion of gas and the resulting shockwave.
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Though no real shark has been subjected to this weapon, it is designed as a protective tool for divers in shark-infested waters. The standard model costs around $500, with larger versions available for $600. Opinions vary online, with some praising the innovation and others urging more humane approaches to shark encounters.