Perhaps someone should explain the concept of Twitter to Shane Carwin because he seems surprised that people are reading what he writes on his page, despite the fact that this is the sole reason for the existence of Twitter.  The heavyweight contender posted some news about his next fight (October 24 in L.A., which puts it at UFC 104) on the social networking website, and apparently he wasn’t supposed to since it hasn’t been officially agreed to by both sides.  Carwin and Cain Velasquez seemed to be on a collision course following Velasquez’s win over Cheick Kongo at UFC 99, so it’s not like he revealed the combination to the safe where Lorenzo Fertitta keeps his getaway money.  Still, he did put Cain on the spot.  If the bout doesn’t happen now, we’ll all know whose bitchassness is to blame.