"Because they aren't bad! They are good! We can help you!"

He moves into a fighting pose as well, he doesn't want to hurt Joss! He's not sure he even can! But maybe he can bind him... Carry him away...

Another rumbling and then there is debris, he glances behind him as the wall begins to crumble. He brings his hand up, but a borderline isn't going to do much in this case.