Mel Gibson reportedly lost control and lashed out at members of the church he attends in Agoura Hills, California on Sunday.
The actor berated the congregation after becoming upset with gossip surrounding his personal life, Radar Onlinereports.
"Mel’s completely lost it," one source said. "[His] holier than thou world is falling apart around him."
It it understood that the Lethal Weapon star paced back and forth, angrily telling the churchgoers that "he would not stand by and be judged and scrutinised".
"Mel got up on this stage - the altar - and went off," the insider added. "He tried to intimidate the parishioners by staring at everyone with his angry eyes. [He] even threatened to shut down the church if people kept gossiping about him.
"He created this mess, and now he’s trying to control it."