With all the slowing-down and speeding-up of videos, I actually have no idea if this Mythbusters clip in which host Adam Savage demonstrates the effects of sulfur hexaflouride on his voice is real or not, but it is cool. I’m pretty sure it’s real, unless wikipedia is somehow wrong (ha):
Here’s some hipster kid doing the same thing. It would be funny if frequent slowed-down video victim Jeff Goldblum inhaled that stuff and went on a talk show. YouTube would go crazy!