The crowded hearing room in which former special counsel Robert MuellerRobert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE delivered his three-hour testimony broke into a rare bout of laughter Wednesday morning when Mueller joked that a lawmaker could get away with making false statements because "it's Congress."

"What if I had made a false statement to an investigator on your team — could I go to jail?" Rep. Sylvia GarciaSylvia GarciaHispanic Caucus asks for Department of Labor meeting on COVID in meatpacking plants Texas Democrat proposes legislation requiring masks in federal facilities Hispanic Caucus requests meeting with private detention center CEOs MORE (D-Texas) asked Mueller.

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"Yes," Mueller replied. "Although, it's Congress, so…” he quipped. 

Mueller then grinned as the audience broke into laughter.

The moment came as a rare reprieve from an otherwise tense few hours of testimony from the special counsel as he recounted his report on Russian interference in the 2016 election.

Mueller repeatedly pointed back to the contents of his more than 400-page report when pressed by lawmakers on both sides of the aisle to clarify details on the origins of his report and its findings.

Mueller on Wednesday told Congress that he generally agreed that lies by Trump campaign officials and administration officials impeded his nearly two-year investigation. He also testified earlier that President TrumpDonald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE refused to sit down for an in-person interview during his investigation.

The former special counsel will also testify before the House Intelligence Committee on Wednesday.