[SunkenCiv]

Any Big Bang Theory fans?

Sulfur Hexafluoride - Deep Voice Gas - YouTube
http://www.youtube.com/watch%3Fv%3Du19QfJWI1oQ

My voice after inhaling Sulfur Hexafluoride - YouTube
http://www.youtube.com/watch%3Fv%3DvcVMjGRzDz8

How to get a deeper voice with Sulphur Hexafluoride - YouTube
http://www.youtube.com/watch%3Fv%3DRaKDLWsWfSM

[The Cajun]

We would use sulfur hex as an insulating gas for our particle accelerator tools, also great for freaking the heck out of the secretaries when they would come in the electronic repair shop, LOL!

Their eyes would get as big as saucers before they caught on, we would sound like "Ironman".