I would not throw a flag for any pyramiding, primarily because the act is (a) minor and, more significantly (b) has no effect on the play. A lineman coming in blocked the ball.
What I would wonder, however is how a flag was not thrown for roughing the kicker. The player that wipes out the kicker at the legs did not touch the ball, nor was he blocked into the kicker.
By Canadian rules, that's a UR for roughing the kicker - 15 yards, automatic first down.