Kaz blushes
Kaz: I-yeah...
He looks really freakin guilty
Kaz:...done with what?
Kaz: Oh. Yeah...
He still looks really freakin guilty, and he's not making eye contact with you
Kaz: I-
He's looking everywhere but at you
He looks at you for a second and then looks away
Kaz looks at his feet
Kaz: I-for what...?
Kaz is still looking at his feet, incredibly guilty
Kaz: I-oh...yeah, I guess I did...