Barbara Walters was given an unexpected reception during her appearance on Thursday night’s ’O’Reilly Factor.’

When Walters began describing the self-made billionaires she interviewed for her upcoming ‘20/20’ special, Bill O’Reilly’s reaction left his guest shocked.

“No, you don’t have to tell me about them. People can watch your special,” O’Reilly said as Walters’ jaw dropped.

The seasoned TV veteran seemed momentarily stunned by O’Reilly’s reaction, but quickly recovered to continue the rest of interview.

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The pair debated a number of issues during the interview, including the "Occupy Wall Street" protests, which O’Reilly described as a “quasi-socialist."

"I don't think that's true Bill," Walters argued. "I don't like that blanket indictment."

When they discussed Walters’ interview with convicted financier, Bernie Madoff, O’Reilly described him as a “sociopath” and a “thug."

While Walters agreed, she said that there were others involved that should “should feel guilty too."