Once upon a time a Marine on Okinawa was told this answer

 

I remember I remember Lewis Sensei telling this

as something he was taught on Okinawa.

 

 

His version was as if a Marine entered an Okinawan Bar,

and someone inside bet a friend he could knock down the next individual to come in, they would put you down. 

The thing was when you got back up, you finished them.