Charlie: Sorry…
Hyacinth: Wait, aren’t you supposed to be in class?
Charlie, nervously: I have a stomach ache.
Hyacinth grins.
Hyacinth: Oh! You’re the deaf one!
Charlie’s face turns red.
Hyacinth: You know I don’t understand whatever THIS is, don’t you?
He waves his hands around in mock sign-language. He’s very pleased with himself.
Charlie winces in a mixture of disgust and embarrassment.