That is a pretty impolite thing to be doing to someone. There's no way you can call that an attempt to make a legal play. I've got an attempt to injure and at the level I officiate, I'd have trouble keeping someone who's doing that in the game (on the "he's gotta go to work tomorrow" principle).
It's not a clear-cut no-arguments situation, but like Welpe I've got absolutely no issue with an ejection here.
