The Rock Shows Vin Who's Boss on 'Fast & Furious'

The Rock just posted a video showing him as the undisputed king of the set on "Fast 8" ... with Vin Diesel nowhere in sight.

The video was shot as production is coming to a close, and it's not coincidental it was filmed hours after Vin Diesel told everyone "Daddy's gone" and left '8' in the dust.

Rock also posted this ... "And like with any team -- that's a family -- there's gonna be conflict. Family is gonna have differences of opinion and fundamental core beliefs. To me, conflict can be a good thing, when its followed by great resolution. I was raised on healthy conflict and welcome it."