Last night (Dec. 10, 2011) at UFC 140: "Jones vs. Machida," which took place at the Air Canada Centre in Toronto, Ontario, Canada, Frank Mir broke Antonio Rodrigo Nogueira's arm in the first round of their co-main event fight.

It was a grisly, nasty submission and resulted in multiple injuries for Nogueira, who flew out today to get surgery to repair the extensive damage.

In the video above, Ryron and Rener Gracie give their breakdown on the bout. They run us through the submission, step-by-step, and provide a detailed analysis of how Mir pulled off the kimura and the various ways Nogueira attempted to stop it, all to no avail.

To watch highlights of the Mir vs. Nogueira fight click here. To see an amazing still-shot of "Big Nog" staring at his mangled arm click here. And for complete UFC 140 results and blow-by-blow coverage of all the night's action click here.