His shot flew up into the trees, knocking a couple of branches down, as David was tackled to the ground. By this point, the plant that David had smoked was giving him hallucinations. He saw the girl as a spy and Nathan was only getting in his way.
"You don't get it!" David yelled as he used the butt of his gun to smack Nathan in his head, "This girl is a spy for the Mechanus! Don't stop me fool, she deserves to die a traitor! All her people do is destroy organic life, they must be stopped!."
David fired wildly then, aiming at everyone. He even shot Javier in the head, as well as some other scientist lady that appeared out of nowhere. His main goal was to kill NOVA.