That's a "lame" excuse .. Mir wasn't dead in the water .. In the all access,he made it perfectly clear that ,he had no idea how he could get Brock down..He's a Jiu Jitsu guy... He waited and it came to him..Stop being a hater !
Mir did what he knows how to do, but Brock's inexperience put his leg into that leglock, up to that point Brock was pwning Mir all over. In fact if you watch again, the second time Mir goes down is from a right hand by Brock...
but.....time will tell, I think he was too excited and needs to stay calm in the ring.