He swung it with the normal force and speed, what was the aim? To chop the zombie's head off its body as that was the only way to kill it. The sword hit the zombie's neck and sliced past immediately as the zombie's head fell to the ground.
He kept to his determination, he didn't waste too much time on the zombie. Vera was battling the tier 3 zombie that charged toward her, and she had already slashed it in the face. In fact, she sliced it from the nose to the eye, its right eye...but the injury was already healing.
She wasn't surprised at all, that was the expectation, tier 3 zombie. The zombie charged toward her again, and she moved aside as the zombie moved past. Then she gave it a long and deep slash in the back causing a large amount of blood to be oozing out of the zombie's back.