(TMZ) -- Blac Chyna went HAM on some guy's phone, and then the guy went OFF ... to talk to the police.

Chyna's listed as the suspect in a misdemeanor vandalism report LAPD took Thursday around 3:30 AM. Law enforcement tells TMZ, the man was shooting video of Chyna as she left a Hollywood club and she wasn't happy about it.

That's obvious in this video shot by another photog, where you clearly see Chyna slap something out of a man's hand. Sources close to Chyna tell TMZ she'd repeatedly told photogs she didn't want to be shot. When they persisted ... she flipped, and threatened to get some "real n***as" to kick their asses.

Based on the video, BC didn't need backup. See the clip here

Photo: Getty Images