Alva made sure to stay ducked in the bush.
"Well, thanks for that." She grunted as she popped her arm that had become uncomfortably stiff. 
"Alright, we need to think logically about this. We look like humans, there is no way he could have heard us, and there are other humans here. So this man is bloody insane." Alva whispered and thought for a few moments,
"Queen Lillia told us to avoid killing anyone, so if we shout at him from this distance and be all insecure and angry like a human would, and ask him what he is doing, perhaps he will rethink his actions. If not, we will probably have to kill him. If he has any friends, we say he was a criminal because he almost killed a person. Does that sound good enough?"