[Bull does indeed look away at the sound, his one eye narrowing slightly when he notices the rocks falling. Wind's blowing at the wrong angle, didn't feel a tremor, could be an animal but then where did it go--

He rolls one shoulder back in a shrug and keeps his voice and stance as casual as possible.]

Better be careful, I wouldn't put it past those assholes to drop a rockslide on us. [And with that side comment, he seemingly puts it out of his mind.] And you know you don't have to do that creepy invisible spying on us, right kid? If you wanna join in, just pull up a chair and ask.