Question about the ending scene in S1E3 (Early Spoilers?)

Recently found this show and safe to safe I’m hooked! I love the quirky characters and the town. It’s interesting how the story feels very grounded in reality but there’s an eeriness about the town that feels like there’s something going on in the shadows that they don’t tell you about (no spoilers, please!).

That being said, I was curious about the dialogue in the dream sequence at the end of S1E3 when Agent Cooper is talking to... the midget and his cousin who looks like Laura. Their speech threw me off, as I’m sure it’s meant to, but I couldn’t pin down what they did to make it sound like that! Did they have them speak their lines and do the scenes in reverse and then play the film/audio backward?