Buffy The Vampire Slayer

Los Angeles - One of the scariest experiences that ever faced Buffy the Vampire Slayer creator Joss Whedon was being stuck speechless while writing for the show.

Renowned for the series’ clever wordplay, Whedon said he worried that his young monster hunter relied too much on Valley Girl dialogue.

So he ditched it all, for one time only.

The result was Hush, an episode in which grinning ghouls known as the Gentlemen steal all the voices from the town of Sunnydale.

The show was released on DVD Tuesday as part of the series’ fourth-season boxed set.

"It was the first time I was ever thinking: ’I can’t possibly pull this off,’ " Whedon said.

"As a director I was falling back on the old, `Well, they’ll sit around and talk and I’ll write a scene and it’ll be cute and funny and that’s that.’ I wanted to take that crutch away."

Fans can get a peek at Whedon’s entire Emmy-nominated script for Hush on the DVD.

In one scene, Buffy’s mentor, Giles, writes on an overhead projector that only a human scream can kill the monsters.

"Taking a deep breath, Buffy let’s out her best yell. Not a peep. Makes a `that’s not gonna work’ face," the script reads.

"That to me was one of the most perfect little jewels I got to create," Whedon said of the episode.

The only thing harder? Two seasons later, writing the musical episode Once More With Feeling, he said. Buffy ended its seven-year run last month.