Jon Jones defeated Daniel Cormier via unanimous decision in the main event of UFC 182 last night in Las Vegas, Nevada. The two had engaged in a heated war of words leading up to the fight and it came to a close with Jones celebrating early, Cormier thinking the bout was over because of it, and the champion using the opening to fire another strike at the challenger before the final bell.
Then, because he could, Jones went all D-Generation X with it:
In an interview with FS1 after the fight, Jones explained his motivations for what you see above.
"If you notice, I threw my last punches before the bell rang. He threw his last punches after the bell rang. Once I saw him almost hit Herb Dean in the face trying to get after the bell punches, that's why I gave him the 'suck it' sign. Because, you know, the respect just wasn't there. I don't like Daniel Cormier. I don't respect Daniel Cormier. I hope he's somewhere crying right now. I'm sure he is. I can't wait until he earns his way back so I can whoop him again."