As Mark thought about it, he started remembering some bizarre moments when he was fighting the past few days. He remembered how his body reactions were quicker than how they previously were. His body was now reacting and also more flexible than before.
When he fought the zombies from a close range, he sometimes felt the sense of danger become more evident than normal and his body would react abnormally to defend against that danger. This never happened before. It would feel like his body was not in his control at that moment, making it more bizarre for him.
He then closed his eyes and opened them as he looked out of the window. It flabbergasted him when he did. Even though it was night, he could see everything clearer than before. It was like his eyes had a pair of binocular on them. His eyesight range also increased a lot. He could see a tree which was approximately 50 meters away from him.