Afiando as mãos com Mestre @erivanboxer #EuQueroNocaute Quem está comigo? Working on my hands with Master @erivanboxer #IwantKnockout who's with me?

A video posted by Junior Cigano Dos Santos (@junior_cigano) on Oct 10, 2014 at 7:12pm PDT

Former UFC heavyweight champion Junior dos Santos, looks like a man possessed.

Hit play and find out for yourself.