When 50 Cent contested he wasn't interested in warring with Shyne -- after being called out on the Belize rapper's 'Un-Thinkable' freestyle -- we should've known something was up.

On Wednesday (Aug. 11) 50 finally got his revenge when he prank called Shyne during a live Ustream conference call with Def Jam and XXL Magazine. 50 recorded the whole fiasco, which shows him pretending to be different disgruntled callers, just to push some buttons. Needless to say -- Shyne wasn't too amused.

"Wow. That's like an all-time low," Shyne told MTV via Skype. "I didn't know he was so desperate. He's gone from confidential informant, witness-protection program dude ... Now, he's a stalker. I was in shock. He didn't call up saying he's Curtis Jackson, Hawaii 5-0. He's a busta. I can't believe it. I can't believe he would stoop to that low. Then again, a guy in the witness-protection program, he has no shame."

Shyne didn't stop there. He continued to emphasize that he was unaware it was 50 calling, since he has no idea what his voice or his music sounds like. And apparently Def Jam didn't disclose the identity of the intruder until the call was a wrap. "I don't know what his voice sounds like. I don't listen to nothing he do," Shyne continued. "The fact that he's sitting in New York, selling his Vitamin Water, listening to my Ustream. What the f---? You're stalking me. Go take some steroids. Find something to do."

Wasn't this what Shyne wanted when he took shots at Fif in his freestyle?