A question on weapons....

[Epsilon]

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What happens when you 'wave Nerf?

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It becomes a semi-liquid. It remains in a solid state until it hits something with sufficient force. Then it liquefies and splatters all over the object in question, coating it in a thin layer. This layer then hardens quickly, forming a foam cushion that somehow absorbs almost all kinetic force.
This substance is used extensively by Trekkie security forces.
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Epsilon