Before her explosive firing, Roseanne Barr was a total terror on set of the hit reboot

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BEHIND THE SCENES …. Before her explosive firing, Roseanne Barr was a total terror on set of the hit reboot, RadarOnline.com can reveal exclusively. ”

A spy snitched, “Anyone can see she was losing it.” The troubled funny lady has a history of explosive mental issues, including, by her own admission, SEVEN split personalities — and none of them are pleasant, said production insiders. She was “flubbing her lines” and having “massive temper tantrums,” another source spilled, adding she was “stressing over every little thing.” People around her feared for the worst. “She was snapping at people,” said the spy, noting no one knew if the show “would survive this.”