Eric thinks "God I badly need to FART!!! I can't do it in front of Erica though - I'll have to hold it in."
Erica: "Er, I'm just going to go make a cup of tea. You want one?"
Eric: "Hmnnng. No Ta."
Erica: "What the hell happened in here?"
Eric: "Er, Earth-quake?"
Erica: "Why does it smell like rotten eggs?"