..a gas called Helium-4, a very rare type of Helium....
[Helium-4 (42He or 4He) is a non-radioactive isotope of the element helium. It is by far the most abundant of the two naturally occurring isotopes of helium, making up about 99.99986% of the helium on Earth.] Is that you Mr White? Yeah, SCIENCE!
But will my voice sound funny if we go to Yellowstone on vacation?