UPDATE:
Producers denied any violence, saying:
"The atmosphere was emotionally charged. However, and contrary to reports that have surfaced about the interview, at no time was anyone ever physically in harm’s way, nor was anyone ever threatened with physical violence.”
PREVIOUSLY:
Jake and Vienna have already secretly reunited to tape their breakup special for ABC and multiple sources say Jake went into an uncontrollable rage, shaking his fist at his former fiancee, threatening to throw a punch, and screaming at her multiple times to shut up.
"Vienna was confronting him, exposing all his lies," a source told Star. "He started screaming at her: 'Shut up! Don't belittle me! Don't question me! Shut up!' And all of a sudden, he literally jumped out of his chair, pulled back his fist and lunged at her! All of the executives were freaking out. They pulled him off of her and rushed them off to separate rooms."
Sounds perfect for ABC, but the source claims even the producers were shocked.
"The execs were screaming at him, 'What the heck are you doing?' And the camera people were all like, 'Oh my god, we can't use any of this,'" the source said. "Vienna is scared to death."
Another source tells Radar a similar story and claims Vienna burst into tears after Jake's shocking display of anger.
"Jake was visibly angry," the source told Radar. "At one point out of nowhere he wheeled back and I thought he was going to throw a punch. He pulled his arm back and his hand was in a fist."
'The Bachelor Breakup' taped Tuesday night and airs July 5.