If nothing else, there’s this small solace for the Joker when it comes to all this acrimony: While it certainly looked as if the Heat’s Jimmy Butler was also coming for him during the chaos, when he could be seen yelling ‘Bring your ass to the back!’” and the Twitter folks deduced that he was challenging Nikola to a good, old-fashioned brawl, a source with knowledge of the situation said Butler was actually furious with Nuggets player development coach and former NBA player Stephen Graham.