According to a live report, Batista was seen jawing with Carson before a match. When Batista returned to the ring, Carson hit Batista in the back/shoulder area. This then led to Batista forcefully shoving him down. Carson then reportedly tried to jump the railing but was stopped and spoken to by security, who then allowed him to remain. Batista then wrestled a match against Big Show.
Later on, Batista flipped off Carson as he passed him while circling the ring. Carson then started "losing it" and tried to jump the railing again, at which point he was walked out by security. It's not been confirmed if this was a publicity stunt or legitimate. WWE performers who physically interact with fans in an aggressive way are legitimately fined by the company. Mark Henry previously said it was a $10,000 fine during an interview.
We'll keep you posted as we hear more.