Seems the crazy was set free after his first extension...
"Coming into the next practice, he just got his money, he cusses out Dick LeBeau," former Steelers safety and current ESPN analyst Ryan Clark said earlier this year,
via ProFootballTalk.com. "Coach LeBeau, somebody who Troy [Polamalu], myself, James Farrior, all respected so much that anything he ever said, there's no reply. We almost got into a physical altercation that day, me and Antonio Brown. Because my thing was, this is not how we behave. This is not how we act. And for sure we don't talk to Coach LeBeau that way."
"I saw Troy get seriously pissed off maybe twice, and this was one of those two times," a source told Yahoo Sports. "Troy was so mad, he says to wide receivers coach Scottie Montgomery, 'The receivers are live [targets] the rest of this period.' Which was Troy's way of saying, 'We're going after this guy.'"
https://www.cbssports.com/nfl/news/...lers-who-had-issues-with-wr-back-in-2012/amp/