[Casual is all he CAN do at this moment to keep himself from having a nervous breakdown right then and there. He's fooling himself and he knows it. It's better to turn away from the fire than try to deal with the fact it exists.]

Yeah, I think you're right. [He says, as if he had just noticed the chaos of what was going on.]

Maybe we should split this joint. Find another place to hang out. [The offered hand from before is still hanging there.] Shall we go? I think it'll do us both some good.