in your esophagus from
the coughing, and that
can be very SERIOUS.
Breaking Bad Season 2, Episode 9
You can't be SERIOUS.
The Big Bang Theory Season 2, Episode 18
...when there are much more SERIOUS
security threats to pursue.
The Big Bang Theory Season 4, Episode 7
Serious?
Breaking Bad Season 2, Episode 5
(chuckling)
Oh, you can't be SERIOUS.
The Big Bang Theory Season 5, Episode 21