Amazingly, despite having left any semblance of defence to the very millisecond, the man managed to make an additional step and then crouch before the spear cut was finalised, blocking it by crossing his forearm over his body and lifting it into the air at such speed to be barely considered human. Obviously as a spear is a lever, the question of jerking it backwards effecting its downward momentum was moot, but that was beside the point. Brennus was already dragging his spear back by this point and behind his body, which led itself nicely into a vicious draw-cut at the man's forearm, likely deep enough to disable the limb, or at the very least cause him to bleed profusely. 

As Brennus had stepped further backwards and the man had remained stationary in a half crouch, his spear thrust had not materialised. He had intended to let the man impale himself on its point, after all. Brennus simply stood watching him from seven feet away, left foot forward, spear point held menacingly between the two of them. It was clear he was fighting an opponent with superhuman powers to have avoided the point of the spear with such last moment evasions twice in a row. Brennus was taking no chances.

Because the man was no longer rushing him, he would not be able to make a grab for the spear. Brennus instead was pivoting the spear, causing the point to rapidly dart upwards and downwards, making it impossible to tell where he planned to strike until the last moment. Not that it mattered, this man was not human.