[youtube=http://www.youtube.com/watch?v=d-XbjFn3aqE]
We all know what helium does to your voice, how aboutsulfur hexafluoride?
[youtube=http://www.youtube.com/watch?v=d-XbjFn3aqE]
We all know what helium does to your voice, how aboutsulfur hexafluoride?