James Corden and Ruth Jones on Julia Davis
James: Julia loves being on the edge of that feeling [of hysteria while filming].
Ruth: Well, she has said that she thinks, for her... Because I know when we did Nighty Night, she always used to say, "If I'm having to fight laughing, then I know it's funny." She doesn't like it if she's not on the edge of laughing.

"House of Fun" - one of the best scenes in all of Gavin & Stacey.