Russell Westbrook unloaded on a heckling fan during Sunday's game against the Charlotte Hornets ... with the LA Clippers star cussing the guy out -- and it was all captured on video.
The tense interaction went down prior to the second half of the Clips' 130-118 road win at the Spectrum Center ... when Russ addressed a spectator who, according to witnesses, had been mouthing off about him in the first two quarters.
The clip of the interaction shows Russ scolding the balloon hat-wearing Hornets supporter .