No, no, I'm SERIOUS.
The Big Bang Theory Season 11, Episode 11
I'm being SERIOUS.
The Big Bang Theory Season 9, Episode 12
I-I am SERIOUS.
The Big Bang Theory Season 12, Episode 3
...doesn't mean I want to have
a SERIOUS relationship.
The Big Bang Theory Season 4, Episode 6
a fugue state
is a very SERIOUS event.
Breaking Bad Season 2, Episode 3