After a clean hit by both Brandon Prust and Jordan Staal in a pile in front of the Rangers bench, Jordan Staal nailed Brandon Prust with a left hand sucker punch to the jaw. Jordan Staal was given a 5-minute match penalty on the play. The fact that there was a match penalty assessed means an automatic review by the league for possibly supplementary discipline.
I will not say that Prust did not embellish to an extent, but it was still a sucker punch and Prust is not known as a diver, so you decide.