the arm check in the lane. He obviously put too much into the contact and yes it was a foul, but no way was a cheap shot, a flagrant call. It should have been called a foul, but as has been pointed out there also at least 3 other plays that with almost identical contact in the game.
One was not called (the first Haws check on Petrusev), the second was called (Harding knocking down Tillie in the lane) and the third was every bit as rough or more as the Haws contact and was not called (Tillie raising forearms while screening Seljass and catching him in the chops).