Smite Visual Glitch

Hey not sure if this is the right place to post this, but I was playing a few games last night (11/29/14) and I had been jungling Amumu and I noticed that the smite icon would send out line strokes up towards the upper left hand corner of the screen. It tended to start after the first time I would cast the summoners spell smite and it would continue like that until the game ended, just a flashing line through the screen from the smite icon to the top left-hand corner of the screen.