I'm SERIOUS.
Breaking Bad Season 3, Episode 13
He's not SERIOUS enough.
Game of Thrones Season 1, Episode 5
I'm SERIOUS.
The Big Bang Theory Season 12, Episode 20
You are not SERIOUS.
The Big Bang Theory Season 12, Episode 17
The girlfriend's buying clothes for you, huh?
Sounds SERIOUS.
The Big Bang Theory Season 2, Episode 10