I always got stuck on
the first CHALLENGE--
The Big Bang Theory Season 7, Episode 3
where's the CHALLENGE?
Breaking Bad Season 4, Episode 2
Maybe since you're so good,
he's taking his time to meet the CHALLENGE.
The Big Bang Theory Season 6, Episode 6
There would be greater shame
in accepting a CHALLENGE from a criminal.
Vikings Season 1, Episode 6
Maybe you need to CHALLENGE
your motor skills.
The Big Bang Theory Season 10, Episode 22