Referee Joe Cortez simply wasn't feeling one of the fighters in this low-key amateur fight so he did what you would expect any referee to do. He got involved.
But he didn't get involved in the kind of way you might have imagined: breaking up the fighters or issuing a warning.
Instead, he... well, you should just watch for yourself:
The seemingly effortless way that he throws the dude down to the ground is absurd. And then, rather than realizing he made a mistake and repenting for it, he puts his dukes up and essentially tries to fight him.
(Via: Daily Motion)