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Blast ball
A Blast Ball (also known as a "Tear Ball" or "Rubber Ball Grenade") is a ball-shaped, rubber coated, less-lethal hand grenade designed for police and corrections applications. A Blast Ball is similar to a traditional "flash-bang" grenade in that, when detonated, it generates a loud noise and bright light. In addition, however, a Blast Ball will also release a chemical irritant, either OC gas or CS gas.
==Application==
Blast Balls can be used against aggressive crowds during situations in which rioters significantly outnumber police or prison guards. In this application scenario, they are intended to frighten away and disperse "casual" rioters, or those who have been "sucked into" the contagion of the crowd, allowing police or prison guards to close with, and engage, the remaining "hard core" element.
One typical deployment of Blast Balls occurred during the 2011 Vancouver Stanley Cup riot and was described by a Vancouver Police Department officer:
Blast balls can also be used to create "negative stimulus" by detonating in areas toward which police do not want the crowd to move, allowing a "herding" effect.〔〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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