There is now an investigation into a $2.2 million dollar bet that was placed on Chris Weidman. I found it strange that Silva was clowning around so early and often in the fight. Also during the post fight interview with Joe Rogan, Silva said that he'd fight again but wouldn't fight for the title again, claiming that he'd had the title a long time and made enough money and that Weidman is the true champion.
I personally thought that the events of that evening were a bit strange but after this information, it may be easier to understand why.