David and Zero instantly use the bullet time technique and already move away from their previous place. Fortunately, they did that because in the next second that place got destroyed by a thunderbolt.
In the next second if a fireball hits that place the monster who just appeared in the place already disappeared from that place. Currently, David and the others are fighting the Lapris. Those are Leopard-like monsters who can use the lightning element.
Basically, they can move at lightning speed and they have various attacks related to the lightning element. Sometime ago Lucas and the others rested to recover their lost energy.
They just fight a group of monsters and after successfully killing that group of monsters they decide to rest. Who could have thought they would immediately get attacked like this?