Anti-helium?

We all know what helium does to your voice, but I've never heard of a gas that gives your Vader-voice. I wonder if it was actually helium in the tank (accounting for the others cracking up so much) and audio enhancement in post-production to give it the deeper sound.

I almost expected to hear "Chanel, what's your favorite scary movie?"


Build a man a fire, he's warm for a day. Light a man on fire & he's warm for the rest of his life!