One time my brothers
made me breathe HELIUM.
The Big Bang Theory Season 12, Episode 6
You see, instead of
using liquid HELIUM...
The Big Bang Theory Season 11, Episode 8
Be even better if he swapped out
the HELIUM for xenon.
The Big Bang Theory Season 11, Episode 8
Not quite accurate.
The Macy's balloons are filled with HELIUM...
The Big Bang Theory Season 4, Episode 24