The electricity contacted Cain for every bit of power it had. It stopped him in his tracks for a moment, but then he continued to move. The electricity didn't stop Cain from continuing his advance as well as his throwing of his spear which flew towards Bjorn in an arc over his shield and impale his left shoulder. The spear went completely through his body and impaled the ground behind him. This happened as Cain's steed dissolved into the wall of flames once more.