That fight looks real to me, except the big guy is definitely not going full power on purpose so he doesn't hurt those smaller men. He had a free shot on the one guy on the ground and could have easily ko'd him, but instead delivered a small punch instead. If they agreed to all go 100%, the small guys are getting destroyed if they don't coordinate their attack. The larger guy appeared to be more skilled than either of them and his huge size advantage means those guys were idiots for trying to clinch. Stick and move if you gotta fight that monster...or stick and RUN unless you're packing some freakish KO power.