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Atemi’ is a term in Japanese martial arts that describes a defensive blow used to neutralize the ki of your partner, ie, put him/her off balance so a technique can be effectively applied. It is not meant to inflict injury, but can result in an instant knockout.

The are 10 scenes in this video where Lillian KO Valerie with atemi in different ways and 10 scenes where Valerie KO Lillian with atemi in different ways.