this is here, not there..most Thai police have a short fuse, don't follow procedures, become instantly aggressive and become unhinged at the drop of a hat. I didn't see the two men punching or slapping, only pushing him away restraining him whilst the other made the weapon safe. I think they feared for their lives and acted accordingly..all over a relatively minor traffic breach it seems. I wasn't there and can only form my own opinion from the video.