The Jumper Zombies pounced at them too fast! As soon as Shane warned everyone, the Zombies were already in action!
Harper used his Pickaxe to stop the Zombie, while Leo used his Forging Hammer and slammed the Zombie away!
However, the Walker Zombies were already on their way to them, so they couldn't finish off the Jumper Zombies, who were pushed away!
On the other hand, Shane wanted to shoot the Zombies since he had plenty of bullets to spare, but because the two Scavengers were panicking due to their lack of weapons, Shane had difficulty aiming even with his Firearm Mastery.
Bang! Bang! Bang!
Their frantic movements clouded Shane's line of sight, and despite his mastery over firearms, his shots went astray. A few of them missed, and the others couldn't kill the zombies since shooting their bodies, or anything other than their brains would not stop them at all.