A man has taught his sister's boyfriend a bitter lession by knocking him out for assaulting his sister.

 

A video of the incident has now gone viral.

 

The visibly angry man who chased his sister's boyfriend across a parking space, was heard talking about how he assaulted and disrespected her. He went on to ask the boyfriend to apologize to his sister before knocking him out.

 

Watch the video below: