JAKE GYLLENHAAL and rapper-turned-actor 50 CENT were NOT pulling punches on the set of their new boxing flick “Southpaw” when “Fitty” – once a real-life street fighter/drug dealer – started jeering nastily at Jake’s boxing moves, then climbed into the ring to give him some “friendly” pointers and…POW-BAM-SMASH!…the dueling duo abruptly started boxing for REAL!
Said My SpyWitness: “50 Cent – who hangs out in boxer FLOYD MAYWEATHER JR.’s entourage – plays a boxing promoter in the film, and at one point he started offering Jake some ‘friendly’ off-screen advice on how to play a professional boxer.
"But things got heated as he kept taunting him about his lack of ‘heart’ and inferior boxing skills. So 50 Cent got into the ring, and suddenly started slamming his co-star with powerful left-right combinations. Jake suddenly went down, but jumped right back up and started flailing back at 50! The blows got harder and harder, and that’s when the director suddenly leaped into the ring and forcibly separated the anger-driven actors!”
No one was declared the winner – but Fitty was flat-out warned: Stay OUT of the ring and do NOT slug the star of our film…EVER!