Picture, for a moment, players of a sports team dogpiling to celebrate a victory. As one person lies down, others pile up on top. Each player added to the pile increases the weight on top of the person on the ground, making it harder and harder for he or she to move or breathe. This immobilizing phenomenon can be referred to as being mechanically restrained. The original person lying on the ground is mechanically restrained and the more weight that is added, the more restricted they become.
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