1:53 AM PT -- Multiple witnesses at the condo tell us Green was acting strange in the lobby of the condo ... screaming at the top of his lungs.
We're told from several people that there was a huge commotion and it took several people -- including emergency personnel -- to restrain Green and get him on a stretcher and into an ambulance.
One source tells us ... one of Green's teammates was at the scene and tried to help ... eventually getting in the ambulance with Green.
We're told cops did respond to the scene and tried to clear out the lobby -- telling everyone, including residents, they needed to leave the area.
Miami Heat's Gerald Green Hospitalized In Miami (Update)
