By this time, several zombies had reached the top, and they all pounced on Lin Wu at once. Lin Wu didn't dare to use the Wind Stinger skill—the space was too small, and a slip could mean falling to become a zombie snack. He could only use his Lock Head skill to send them away. Lin Wu went beneath the mechanical arm, reloading and staying on guard; he shot each one as it came up.
However, due to continuous use of Lock Head, Lin Wu's head began to swim, and stars appeared before his eyes. The system alerted him that he was overusing his skill. If he continued, he would start to experience symptoms such as ringing in his ears. Lin Wu switched to his shotgun instead; it didn't require Lock Head, and with one shot he could knock down a zombie and even topple another.
Qinglang finally slid onto the roof of the train, and Lin Wu stomped his foot and shouted, "Go!" He handed the shotgun and ammo to Qinglang, and he himself took a pistol and aimed directly.