The scene where Buffy objects to Giles' drawing of her with wide hips, was apparently improvised by Sarah Michelle Gellar.
Joss Whedon claimed he wrote this as a challenge to himself. Critics had hailed him for his deft use of banter and witty wordplay, so he decided to see if he was a good enough writer to craft a script which was largely lacking any dialog at all.
Alyson Hannigan was asked in a May 6, 2003, interview with Fred Topel, which was her favorite. She said: Hush (1999), the silent one, because it was so interesting to do. I had never done anything like that and it was just such an interesting process, having to really know where each moment was because you didn't have the benefit of words. It was so compelling."
The cast found the Gentlemen actors in make-up and costume to be terrifying in broad daylight, and Joss Whedon was so impressed with the physical movements of The Gentlemen that he admitted on the DVD commentary that his mocking of mimes in general "went down about 40%" after the episode was filmed.
Two of the Gentlemen, Doug Jones and Camden Toy, were able to sustain the creepy smile while on camera, without aids.