Roadkill,We arn't clicking on this.When the timing is retared electricly it makes the spark later,the rotor is still moving. So too much retard and it goes passed the cyl it should fire.If it fires back it,s firing the cyl it should.If it fires the next cyl in rotation,kick back. Due to less pressure it,s easy for the spark to go there.IF it would fire the cyl that was allready passed tdc there would be no kick back.Bill.