Multiple sources who were inside Club Onyx tell TMZ the fight started when Vince went to take money out at the "cash cage." We're told Vince was complaining about a surcharge to withdraw money -- and that's when the manager got involved.
We're told the manager is from Oklahoma and flashed an upside down "hook 'em horns" hand signal and said "F**k the Longhorns" to Vince -- who, if you don't know, was a National Championship quarterback for the University of Texas Longhorns.
That's when Vince allegedly socked the manager in the face and had to be dragged out of the club, according to sources. Vince's reps haven't gotten back to us yet.
According to KDFW, Vince was issued a Class C assault citation today, which carries up to a $500 fine. The station aired this surveillance video of the incident.