An EXTENSION of his ability
to leap buildings...
The Big Bang Theory Season 1, Episode 2
And by EXTENSION, you know,
neither are you.
Breaking Bad Season 2, Episode 12
...adult EXTENSION programme
at the university.
Breaking Bad Season 3, Episode 9
I believe this is an EXTENSION
of the death metaphor.
The Big Bang Theory Season 2, Episode 8
That means it's better than his research,
and by EXTENSION, of course, yours.
The Big Bang Theory Season 4, Episode 3