
You are not SERIOUS.
The Big Bang Theory Season 12, Episode 17

...is a SERIOUS disease, which could lead
to congestive heart failure.
The Big Bang Theory Season 3, Episode 11

Well, ever since I was a kid,
but, uh, I didn't really get SERIOUS...
The Big Bang Theory Season 8, Episode 7

SERIOUS congestive
heart failure,
The Big Bang Theory Season 5, Episode 4

l am SERIOUS too.
Breaking Bad Season 4, Episode 2