Rob Gronkowski does not like Sergio Brown, even though the Colts safety used to play for New England. Back in 2012, Brown was the one who caused Gronkowski to break his arm on a point-after attempt. (Gronkowski shouldn't have been in the game that late anyway, but he's not going to be mad at his own coaches.)
Anyway, Gronk—who was already jawing throughout the game—took his anger out tonight during Jonas Gray's fourth touchdown, blocking Brown beyond the field and into the camera cart off-screen. He was congratulated with a 15-yard unsportsmanlike conduct penalty.