Two of the UFC’s most colorful characters, former light-heavyweight champion Tito Ortiz and heavyweight contender Matt Mitrione were videod by Roy Nelson getting into a heated argument at the ‘UFC Fighters Summit’ which has been running in Las Vegas this week.

Unfortunately you can’t hear what they are saying, but we have a fair idea what they might be bickering about.

On a recent edition of Ariel Helwani’s ‘MMA Hour’ show, Mitrione was making his regular contribution in ‘The Mitrione Minute’ when he made reference to Ortiz’ partner, former porn star Jenna Jameson.

Stating that she might have to fight for him he then quipped, “But don’t forget, she’s awesome off her back, she has great top control and she’s almost impossible to choke.”

Naturally Ortiz wouldn’t have taken too kindly to that remark, and it looks as if he chose the Fighters Summit to let his feelings be known. Mitrione appeared to be in no mood to apologize however, and at one stage looks reaady to throwdown with him, before the two were eventually separated by UFC officials and lightweight star Georges Sotiropoulos.

Check out the video of their altercation below.