"I'VE SEEN ALL THE LAUGHTER!!!"
The man who Nate Diaz made flinch at the Jake Paul fight on Saturday is furious with the UFC star ... saying he now wants to KO the guy for embarrassing him.
If you missed it ... at some point during Paul's bout with Tyron Woodley, Diaz pretended to throw a huge haymaker at MMA fighter Carrese Archer in the stands.
The scene was captured on video ... and it showed Archer actually spilled his drink everywhere as he thought Diaz's punch was really coming in.