What?
You're familiar with the REFERENCE?
The Big Bang Theory Season 10, Episode 7
...you'd be in a non-inertial
REFERENCE frame and would...
The Big Bang Theory Season 1, Episode 3
Yeah, for future REFERENCE,
that's a while.
The Big Bang Theory Season 7, Episode 15
And for future REFERENCE,
it's this.
The Big Bang Theory Season 5, Episode 12
That is a cleverly veiled REFERENCE
to Howard's lifelong obsession...
The Big Bang Theory Season 6, Episode 9