Check out the pic from the SI site, the one with Head & Shoulders with his hands on Brady's head. According to Mankins that's what they were pissed off about.
Notes: Offensive line protects Brady in more ways than one
CSNNE.com Staff and Wire Reports
PITTSBURGH -- You saw Tom Brady's forceful spike of the ball after his third-quarter touchdown, of course.
You may not have seen what prompted it.
As Brady bulled his way into the end zone, Troy Polamalu and some of the other Steelers attempted to grind the Pats' quarterback's head into the turf. And that got the Pats' offensive linemen into the act, coming to their QB's defense.
"We don't care how long your hair is," said Logan Mankins (referring to Polamalu and not Brady). "You can't just do anything you want to our quarterback."
Brady, for his part, got to his feet, screamed two well-known words at the Steelers, and violently spiked the ball into the end zone.