"You lie your insane husband attacked me you psycho", Arnold wrote. "I'm filing a police report & suing you for defamation".
How I Met Your Mother's Alyson Hannigan confirmed that the fight really happened, tweeting "Walked n2 party behind Tom Arnold and saw him & Mark Burnett get into a fight!" Imagine having to explain that not only is Donald Trump president, but Tom Arnold is on a mission to take him down. "He's okay. We gotta protect this brutal angel", he wrote. The pair reportedly settled down before entering the venue. His series follows his search for alleged video recordings of Donald Trump making discriminatory statements or using the n-word.
Arnold's new show, "The Hunt for the Trump Tapes", debuts on Tuesday on Viceland.
Some have speculated the fight was a publicity stunt.
Mr. Arnold has insisted since 2016 that Mr. Burnett has access to racist outtakes from NBC's "The Apprentice" but refuses to make them public. Arnold was a friend of Trump's for decades before Trump was elected president, and since then Arnold has been trying to expose him. Last night, the two attended the same pre-Emmys party, and they appear to have gotten into a physical altercation over some Trump tapes. "I don't have that word in my vocabulary, and never have".
Arnold also claims that there was a fourth person, filmmaker Bryan Fogel, who witnessed the entire ordeal, and started to filmed it before Downey knocked his phone from his hand.
A rep for Burnett did not return Fox News' request for comment.
Discussing last night's incident with a group of party attendees, we hear an excited Arnold was asked if he actually had any Apprentice tapes of Trump and answered in the affirmative.