![Be even better if he swapped out
the helium for xenon.
Be even better if he swapped out
the helium for xenon.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Be even better if he swapped out
the HELIUM for xenon.
The Big Bang Theory Season 11, Episode 8
![the abbreviation for helium.
the abbreviation for helium.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
the abbreviation for HELIUM.
The Big Bang Theory Season 7, Episode 3
![You see, instead of
using liquid helium...
You see, instead of
using liquid helium...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
You see, instead of
using liquid HELIUM...
The Big Bang Theory Season 11, Episode 8
![](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
"Helium."
The Big Bang Theory Season 2, Episode 5