It starts with an issue with his earpiece while introducing a news package. The moment the report starts playing, the anchor goes on a tirade about his earpiece not functioning properly.
"Why don't I have sound? Alright it's back, someone is pressing buttons and turning the sound off. Who's asking for a Labour Day rundown in my ear?" he complains to his crew.
And then he loses it!
"Someone in that control room is out of control," he says frustratingly.
What follows is a foul-mouthed rant about his ear-piece and afterwards hammering sounds from the adjacent room. He even turns down a crew member who tries to replace his ear piece.
The over 8-minute-long video has been leaked by media-watch website "Mediaite" and since been reposted on several social media platforms.
The video contains strong language, viewer discretion is advised
After the leaked clip went viral, the anchor took to Twitter to apologise for his behind-the-scenes behaviour.
A better anchorman and a better person would've had a better reaction to technical difficulties. I'm sorry.— Lawrence O'Donnell (@Lawrence) September 20, 2017
But Twitter, like always, saw the lighter side of things and made a mashup of the clip, inspired by MC Hammer.
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STOP THE HAMMERING pic.twitter.com/ZZ0lSXw5sf— Ryan Middleton (@ryanmiddleton) September 20, 2017