Technically legal but borderline cheap hit, especially in preseason. I certainly would be pissed if it were a Pats player, especially one of their stars. I thought of the Gronk hit right away as well. ODB is damn lucky that his cleat didn't stick in the turf. It just slipped out at the last minute.
Having said that...going down on all fours with his head on the cement in the runway to the locker room after jogging off the field on his own (also a "look at me" move), knowing that the camera was following him, was a bit much. Roethlisberger-esque manufactured drama.