Jamie Foxx was held in a headlock last night before club security broke up the brawl and dragged the other guy out in a choke hold ... and TMZ obtained video from inside the club seconds after the fight.
Jamie got into a scuffle at the Belvedere Red party at Avalon last night. According to an eyewitness who was in the thick of things, Foxx and the other guy were in a long conversation -- and a pretty intense handshake -- when the guy suddenly pulled Jamie down and put him in a headlock.
We're told it took security about 20 seconds to pull the guy off Jamie and then drag him out.
No cops were called and there were no injuries.