Yeah, you kiddin'? It oughta be a shock for anyone, no matter how crazy!

[He doesn't know any better than to take Lab at face value, at least not in this; in his own mind, he's gotten away with diverting the topic from anything awkward about his own life, and that's what matters. He lightens immediately, despite his complaining.]

Nothin' can really prepare you for stuff like this, right?