Oh, we'll make the puzzles
extremely CHALLENGING
The Big Bang Theory Season 9, Episode 8
- Just as CHALLENGING as you?
- Yeah...
The Big Bang Theory Season 10, Episode 5
Not CHALLENGING?
I was humiliating the man.
The Big Bang Theory Season 6, Episode 6
I know what a CHALLENGING man he could be,
The Big Bang Theory Season 9, Episode 14
wow, a CHALLENGING time,
to put it mildly.
Breaking Bad Season 2, Episode 10